LON - SFO

£255 Find Cheap Flights from London to San Francisco

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to San Francisco departing on 25/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco.
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Cheap Flights from London to San Francisco (LON-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to San Francisco

Mon, 25 Aug - Sun, 7 Sep
SWISS Logo
08:40 - 16:10LHR-SFO
15h 30m1 stop
SWISS Logo
19:30 - 17:50SFO-LHR
14h 20m1 stop
£255SWISS
Find Deal
Wed, 12 Nov - Wed, 19 Nov
SWISS Logo
20:05 - 16:25LHR-SFO
28h 20m1 stop
SWISS Logo
19:25 - 21:40SFO-LHR
18h 15m1 stop
£326SWISS
Find Deal
Tue, 16 Sep - Tue, 23 Sep
British Airways Logo
15:05 - 23:59LGW-SFO
16h 54m1 stop
British Airways Logo
06:10 - 08:10SFO-LGW
18h 00m1 stop
£353British Airways
Find Deal
Mon, 25 Aug - Tue, 9 Sep
Virgin Atlantic Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Virgin Atlantic Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
£372Virgin Atlantic
Find Deal
Wed, 3 Sep - Tue, 23 Sep
Virgin Atlantic Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Virgin Atlantic Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
£374Virgin Atlantic
Find Deal
Wed, 24 Sep - Thu, 2 Oct
British Airways Logo
10:45 - 13:50LHR-SFO
11h 05mdirect
British Airways Logo
16:30 - 10:55SFO-LHR
10h 25mdirect
£378British Airways
Find Deal
Fri, 5 Sep - Sat, 20 Sep
Lufthansa Logo
08:40 - 16:10LHR-SFO
15h 30m1 stop
Lufthansa Logo
19:55 - 14:10SFO-LHR
10h 15mdirect
£425Lufthansa
Find Deal
Fri, 5 Sep - Fri, 19 Sep
Lufthansa Logo
06:30 - 12:40LHR-SFO
14h 10m1 stop
Lufthansa Logo
19:55 - 14:10SFO-LHR
10h 15mdirect
£428Lufthansa
Find Deal
Sun, 7 Sep - Sun, 14 Sep
United Airlines Logo
07:25 - 19:00LHR-SFO
19h 35m1 stop
United Airlines Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
£439United Airlines
Find Deal
Wed, 3 Sep - Mon, 22 Sep
United Airlines Logo
08:40 - 16:35LHR-SFO
15h 55m1 stop
United Airlines Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
£459United Airlines
Find Deal
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KAYAK's insights & trends for London to San Francisco flights

Get data-powered insights and trends into flights from London to San Francisco to help you find the cheapest flights, the best time to fly and much more.

Find cheap flights to San Francisco
Find cheap flights to San Francisco

Planning a trip from London to San Francisco? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

What is the cheapest London to San Francisco flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from London to San Francisco.

Our data shows that the cheapest route for a return flight from London to San Francisco cost £362 and was between London Heathrow Airport (LHR) and San Francisco (SFO). On average, the best prices are found if you fly this route. The average price for a return flight for this route is £362.

What’s the cheapest day of the week to fly from London to San Francisco?

The average price of all round-trip flights from London to San Francisco clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Tuesday and more expensive on a Sunday. On your return trip to London, you should consider flying back on a Wednesday, and avoid Saturdays for better deals.

What is the cheapest month to fly from London to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to San Francisco is February, where tickets cost £425 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is £669 and £662 respectively.

Can I save money by flying with a stopover from London to San Francisco?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £1,041 on average.

How far in advance should I book a flight from London to San Francisco?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London to San Francisco, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.


Good to know - Cheap tickets from London to San Francisco

Low seasonJanuary
High seasonJuly
Cheapest flight£230
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly (32% more expensive on average)
Flight from London Gatwick Airport to San Francisco

When to book flights from London to San Francisco

Are your dates flexible? Find out the best times to travel from London to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from London to San Francisco: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from London to San Francisco 
AlastairFlew with British AirwaysLHR-SFOFeb 2025
Make sure your free checked luggage is for outward and return flights.
Verified travelerFlew with United AirlinesLHR-SFOSept 2024
Download all your music. Add shows and movies to your queue. Bring short so you can relax. Bring long charger cords.
Verified travelerFlew with American AirlinesLHR-SFOMar 2024
Heathrow is vast, allow plenty of time to drop bags and go through security. At San Francisco the immigration takes a bit of time and we had to wait around 1.5hrs, bare this in mind when booking car rental. The is a shuttle train from the airport to the car rental area which is very slick and efficient.
Ana-MariaFlew with IberiaLHR-SFOMar 2024
In London triple check your flight they have multiple leaving for the same destination once - it is easy to get them confused

FAQs for booking flights from London to San Francisco

  • Is there a rail service linking San Francisco airport to the city centre?

    The BART rail service links San Francisco airport with the city centre, running from 8am to midnight every day, with a frequency of every 20 mins. The BART also links the airport to the East Bay and San Mateo County. The SFO BART Station is located at the International Terminal in departures. To reach it from other terminals you can take the SFO AirTrain which links all terminals to each other. You can purchase a ticket at the BART station.

  • What bus services are available at San Francisco airport?

    SamTrans buses link San Francisco airport to the city centre, Palo Alto and San Mateo County. Lines stopping at the airport are SFO, ECR, 292, 397 and 398. It’s a 24-hour bus service, and you can hop on outside of Arrivals at Terminal 2 and 3, outside of International Terminal Level 1 and Curbside.

  • Are there any onsite airport hotels available at San Francisco airport?

    There are nap rooms available inside San Francisco airport, in the international terminal which are open 24 hours. The rate is $40 USD (about 32 GBP) per hour or $120 USD (about 95 GBP) for 8 hours. Alternatively, there are 5 hotels all within 5 minutes from the airport, and all offering free airport shuttle service.

  • Where can I have a shower at San Francisco airport?

    For a refreshing shower after a long flight from London to San Francisco, head to Freshen Up which is located in International Terminal level G. They are open 24 hours, and their rates start from $25 USD (about 20 GBP) for a Deluxe shower, which is a 30-minute shower and includes a towel, soap, shampoo, and other amenities on demand such as a hair dryer.

  • What visa do I need to fly to San Francisco?

    UK passengers will need to get a visa waiver through the Electronic System for Travel Authorization (ESTA) before they fly to San Francisco. You can make your ESTA application online through the US State Department website. You must have a valid British passport when you visit the United States.

  • How can I hire a car at San Francisco International Airport?

    Hiring a car at San Francisco International Airport is an easy and convenient way to start your trip. Car hire services are available at the Car Rental Center, which is connected to the airport terminals via the San Francisco AirTrain. To access the car hire centre, you should take the AirTrain blue line to the car hire stop. The AirTrain service at San Francisco Airport operates 24 hours.  

  • What is the cheapest flight from London to San Francisco?

    In the last 3 days, the lowest price for a flight from London to San Francisco was £313 for a one-way ticket and £346 for a return.

  • Which airports will I be using when flying from London to San Francisco?

    There are 6 airports in London (London City, London Gatwick, London Heathrow, London Luton, London Southend, and London Stansted.) and only 1 airport in San Francisco (San Francisco). The cheapest flights are generally found on the London Gatwick Airport to San Francisco flight route.

  • Which airlines offer Wi-Fi service onboard planes from London to San Francisco?

    Only KLM offers inflight Wi-Fi service on the London to San Francisco flight route.

  • Which aircraft models fly most regularly from London to San Francisco?

    The Boeing 777 is the aircraft model that flies most regularly on the London to San Francisco flight route.

  • Which airline alliances offer flights from London to San Francisco?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between London and San Francisco, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from London to San Francisco?

    There are direct flights from London to San Francisco on a daily basis.

  • Which is the best airline for flights from London to San Francisco, KLM or Austrian Airlines?

    The two airlines most popular with KAYAK users for flights from London to San Francisco are KLM and Austrian Airlines. With an average price for the route of £451 and an overall rating of 7.8, KLM is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of £491 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from London to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to San Francisco with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London to San Francisco

  • Looking for a cheap flight from London to San Francisco? 25% of our users found flights on this route for £442 or less one-way and £407 or less round-trip.
  • There are direct flights from London to San Francisco with Virgin Atlantic, British Airways and United airlines. All airlines offer a comfortable leg room of about 79 cm in average, and all offer on-demand video to keep passengers entertained. Virgin Atlantic and United airlines also have Wi-Fi available on board for a fee.
  • If you are flying with Air France or KLM airlines, you can head to their dedicated airline lounges in San Francisco airport for a bit of quiet space, both located in the International Terminal. KLM passengers will be happy to know that they also have a lounge in London Heathrow Airport.
  • If you have a bit of time before your flight, head to the San Francisco Airport Aviation Library and Aviation Museum, both located in the International Terminal. They are free of charge to access, and will give you an insight into the world of air transport and commercial aviation.
  • Passengers travelling with children can head to Terminals 2 and 3 for Kids’ Spots play rooms. If you need supplies for babies such as diapers, medicine and food, you will find them available at one of the News kiosks. Stroller and baby equipment are available for rent from Cloud of Goods.
  • There is never a dull moment at San Francisco airport, as you will find about 20 exhibitions on show at any one point throughout the airport. These can include photographs, paintings, installations and video arts. The Video Arts Room is located in the International Terminal and shows short films (10 minutes and less in length) from 5am to midnight, with new films showing every 4 weeks.
  • If you want to find cheap flights from London to San Francisco and lower your carbon footprint, you can use KAYAK’s CO2 emissions search filter to discover the greenest routes. For instance, you can lower your carbon output by around 35% when you fly from London Heathrow Airport (LHR) with KLM or with American Airlines. Flights to San Francisco (SFO) with KLM are direct and take around 11 hours altogether. Meanwhile, if you fly with American Airlines, your journey will take around 16 hours and include one layover at Philadelphia Airport (PHL). Choosing low-emission routes may somewhat increase your travel costs.
  • Most cheap flights from London to San Francisco depart from London Heathrow Airport (LHR) or London Gatwick Airport (LGW). If you're booked on an early flight, both London Heathrow and London Gatwick have a range of on-site hotels. Passengers flying with British Airways from Heathrow can check into Sofitel, which is connected to Terminal 5. Meanwhile, travellers flying from Gatwick can stay at Yotelair, which is connected to the airport’s South Terminal.
  • If you've got some spare time after you land at San Francisco Airport, you can visit the Sky Terrace. It offers incredible views of the airport runways and is usually open from 10 am to 6 pm throughout the week.

Prefer to fly direct from London to San Francisco?

Find which airlines fly direct from London to San Francisco Airport, which days they fly and book direct flights.

Direct departures

London to San Francisco

Monday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Tuesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Wednesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Thursday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Friday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Saturday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Sunday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

See more direct flights

Direct returns

San Francisco to London

Monday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Tuesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Wednesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Thursday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Friday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Saturday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Sunday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

See more direct flights
See more direct flights

Top 5 airlines serving from London to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from London to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1358 reviews
7.1Entertainment
8.4Crew
7.7Comfort
7.8Boarding
7.2Food
Airline reviews

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

8.0 ExcellentShereen, Apr 2025AMS - YUL
Read more KLM reviews

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Great boarding, great short flight but no entertainment whatsoever. It was supposed to have wifi but that did not work.

Good flight with KLM, friendly staff. Food was good, had much worse on other airlines. Selection of drinks also good enough for us. Entertainment was also good. The economy seats are ok and that’s it. For a 12 hour flight I think a little more comfort in the economy seats in pitch and softness would be highly appreciated by the customers and can makte the difference.

Good food. Excellent crew service. Clean aircraft. Narrow seats and isle.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

headphone jack didnt work for the first flight and not much variety

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

We paid for business class, and my seat did not work at all. Each time I wanted to adjust the position, an attendant had to come to physically force the seat into its new position. They tried to fix it by fiddling with the electronics (military reset, for example), to no avail. Also, the food was just mediocre. We were at the end of a serving section, so they ran out of several choices. (This was on the flight from Los Angeles to Munich.)

The flight was delayed by an hour. Made the connection uncomfortably tight.

The plane was very clean. The bathroom was clean as well. The land crew were very polite and informative and helpful. They informed me that there is a long way and challenging to go from international terminal to national terminal and in addition to getting my suitcases and going through customs and dropping them again for my second leg of trip which was San Francisco to Los Angeles . I have left knee issue and had a recent fall with aching muscles all over, the land crew suggested wheelchair help for me, God bless her. If I did not have help, I could not make it to my last terminal. Thank you UNITED AIRLINE!

I was very happy with everything, thank you for the smooth flight ✈️

helpful and friendly. The Lufthanza people I dealt with before my holiday were so unhelpful by comparison.

Entertainment system is old. Food can be tastier Need to provide toothbrush and toothpaste at least when asked.

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

Terrible experience. Should be a short simple flight from San Francisco to Palm Springs. Disgusting insult that United Air doesn’t have a cabin crew ready to receive a plane that’s already an hour plus late in departure. Lots of misinformation along the way from cockpit and crew. Definitely unimpressed with both union and management.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

Flights scheduled with impossible connections - Lufthansa apparently believes it takes 7mins to change terminals, go through passport control, re-clear security and walk 1.8kms…..and everything will work perfectly (which it never does at Frankfurt). No staff on hand to assist with transfers on delayed flights. No transfer guidance provided by app. No compensation offered for 6hr delay to connecting flight.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

Everything you need to know for your flight from London to San Francisco

Other airlines flying from London to San Francisco

Flights from the other most popular airlines that fly from London to San Francisco according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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