LHR - SAN

£329 Find Cheap Flights from London Heathrow Airport to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to San Diego departing on 27/10. 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 Diego

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Diego.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Diego.
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Flights Deals

Cheap Flights from Heathrow to San Diego (LHR-SAN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to San Diego 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 Heathrow to San Diego

Wed, 17 Sep - Mon, 22 Sep
Lufthansa Logo
06:55 - 15:25LHR-SAN
16h 30m1 stop
Lufthansa Logo
12:52 - 09:40SAN-LHR
12h 48m1 stop
£440Lufthansa
Find Deal
Wed, 3 Sep - Mon, 22 Sep
Lufthansa Logo
07:25 - 15:25LHR-SAN
16h 00m1 stop
Lufthansa Logo
12:52 - 09:40SAN-LHR
12h 48m1 stop
£441Lufthansa
Find Deal
Mon, 1 Sep - Mon, 15 Sep
 Logo
07:25 - 15:25LHR-SAN
16h 00m1 stop
 Logo
16:03 - 12:20SAN-LHR
12h 17m1 stop
Wed, 10 Sep - Wed, 24 Sep
United Airlines Logo
07:25 - 15:25LHR-SAN
16h 00m1 stop
United Airlines Logo
14:21 - 12:20SAN-LHR
13h 59m2 stops
£469United Airlines
Find Deal
Tue, 9 Sep - Wed, 17 Sep
United Airlines Logo
07:25 - 15:25LHR-SAN
16h 00m1 stop
United Airlines Logo
07:00 - 12:20SAN-LHR
21h 20m1 stop
£470United Airlines
Find Deal
Mon, 24 Nov - Tue, 2 Dec
 Logo
06:30 - 17:24LHR-SAN
18h 54m2 stops
 Logo
12:45 - 07:10SAN-LHR
34h 25m2 stops
Mon, 15 Sep - Mon, 22 Sep
Air Canada Logo
08:30 - 19:35LHR-SAN
19h 05m2 stops
Air Canada Logo
08:10 - 09:35SAN-LHR
17h 25m1 stop
£489Air Canada
Find Deal
Mon, 25 Aug - Tue, 9 Sep
British Airways Logo
11:30 - 14:50LHR-SAN
11h 20mdirect
British Airways Logo
16:40 - 12:50SAN-LHR
12h 10m1 stop
£501British Airways
Find Deal
Wed, 1 Oct - Fri, 10 Oct
Air Canada Logo
14:05 - 00:15LHR-SAN
18h 10m2 stops
Air Canada Logo
08:10 - 06:30SAN-LHR
14h 20m1 stop
£509Air Canada
Find Deal
Tue, 7 Oct - Mon, 20 Oct
British Airways Logo
15:10 - 22:24LHR-SAN
15h 14m1 stop
British Airways Logo
19:50 - 14:20SAN-LHR
10h 30mdirect
£510British Airways
Find Deal
Expert advice

Expert advice for your flight from Heathrow to San Diego

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
British Airways

BA's premium economy offers 18 cm extra legroom, ideal for long-haul comfort.


BA's cabin crew are professional and proactive, enhancing the long-haul experience.

Finnair

Finnair's A350 offers lower cabin altitude and higher humidity for a more comfortable journey.


Finnair's Economy Comfort offers more legroom for a small additional charge, enhancing long-haul comfort.

Read more about Finnairby Gabriel Leigh
Our travel experts
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Booking Insights

KAYAK's insights & trends for Heathrow to San Diego flights

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

What’s the cheapest day of the week to fly from London Heathrow Airport to San Diego?

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

If your flying dates are flexible, you should consider flying to San Diego on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from London Heathrow Airport to San Diego. For your return ticket, we recommend flying on a Monday and avoiding Wednesdays for the best deals.

What is the cheapest month to fly from London Heathrow Airport to San Diego?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to San Diego, 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 Heathrow Airport to San Diego is January, where tickets cost £480 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £780 and £729 respectively.

Can I save money by flying with a stopover from London Heathrow Airport to San Diego?

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 1 stop stopover the cheapest option at £2,564 on average.

How far in advance should I book a flight from London Heathrow Airport to San Diego?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to San Diego, 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 Heathrow Airport to San Diego, you should book around 2 weeks before departure, which saves you about 12% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.


Good to know - Cheap tickets from London Heathrow Airport to San Diego

Low seasonMarch
Cheapest flight£329
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly and prices are also 3% lower on average.
Flight from London Heathrow Airport to San Diego

When to book flights from Heathrow to San Diego

Are your dates flexible? Find out the best times to travel from Heathrow to San Diego 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.

FAQs for booking London Heathrow Airport to San Diego flights

  • What is the cheapest flight from London Heathrow Airport to San Diego?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to San Diego was £435 for a one-way ticket and £582 for a return.

  • Which airports will I be using when flying from London Heathrow Airport to San Diego?

    London Heathrow Airport and San Diego are both served by 1 main airport. You will leave London Heathrow Airport from London Heathrow and will be arriving at San Diego.

  • Which aircraft models fly most regularly from London Heathrow Airport to San Diego?

    The Boeing 787-8 Dreamliner is the aircraft model that flies most regularly on the London Heathrow Airport to San Diego flight route.

  • Which airline alliances offer flights from London Heathrow Airport to San Diego?

    oneworld is the only airline alliance operating flights between London Heathrow Airport and San Diego.

  • On which days can I fly direct from London Heathrow Airport to San Diego?

    There are direct flights from London Heathrow Airport to San Diego on a daily basis.

  • Which is the best airline for flights from London to San Diego, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from London to San Diego are United Airlines and Air Canada. With an average price for the route of £565 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of £523 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to San Diego?

    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 Heathrow Airport to San Diego.

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

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

  • What is the Hacker Fare option on flights from London Heathrow Airport to San Diego?

    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 Diego with an airline and back to London Heathrow Airport with another airline.

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

    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 Diego from London Heathrow Airport 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 Heathrow Airport to San Diego

  • Looking for a cheap flight from San Diego to London Heathrow Airport? 25% of our users found flights on this route for £548 or less one-way and £507 or less round-trip.

Prefer to fly direct from London Heathrow Airport to San Diego?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from London Heathrow to San Diego.
Find which airlines fly direct from London Heathrow Airport to San Diego Airport, which days they fly and book direct flights.

Direct departures

London Heathrow to San Diego

Monday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Tuesday

Alaska Airlines, American Airlines, British Airways

Alaska Airlines, American Airlines, +1 more

Wednesday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Thursday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Friday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Saturday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Sunday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

See more direct flights

Direct returns

San Diego to London Heathrow

Monday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Tuesday

Alaska Airlines, American Airlines, British Airways

Alaska Airlines, American Airlines, +1 more

Wednesday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Thursday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Friday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Saturday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

Sunday

Aer Lingus, Alaska Airlines, American Airlines, +3 more

Aer Lingus, Alaska Airlines, +4 more

See more direct flights

Reviews of the top 5 airlines flying from Heathrow to San Diego

 
See real verified KAYAK customer reviews for airlines flying from London to San Diego. 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 Heathrow to San Diego? 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.
7.6
FinnairOverall score based on 1317 reviews
6.9Entertainment
6.7Food
7.4Comfort
7.6Boarding
8.1Crew
Airline reviews

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

6.0 GoodAnonymous, Jul 2025HEL - DFW
Read more Finnair reviews

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

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,

Horrible almost missed my flight because my 1st flight was delayed. Airline crew is so unprofessional. The people on the plane do whatever they want kids running screaming. Will never fly this airline again Suitcases never arrived

Check in needed to be in person, not nice. Also I won’t do connections in Charlotte again because you need to go through security again and short connections become a problem

It was good but I did not appreciate not being able to check in online

Boarding was odd. Gates switched and had to take a bus to the plane. Luggage got lost. Still waiting on one bag. Flight itself was very nice!

Do Not Fly Iberia. Horrible experience. Iberia changes things at random -like the date of the flight and seat you have bought. After buying my flight, they contacted me and told me I had to return a day later. Then when I was boarding the flight, I discovered they had changed my window seat in a row away from the wing, to an aisle seat in front of the toilet! The worse seat on the plane. But it wasn’t just me- a family was scattered all over the plane. I was able to trade my seat because a father was separated from his son. Unfortunately the seat was the window seat directly over the wing, the loudest seat in the plane. I couldn’t sleep, even with noise cancelling earphones. Also, I ordered gluten free meal-which was tasteless and gave me cramps.

I described my experience in the previous window. I didn't realize that there would be another opportunity for this flight. Please look at my response in the previous window.

I have nothing but great things to say about the crew of the American Airlines flight from Madrid to Dallas. They were fantastic! I do, however, have some disregard for the flight attendant that was late in Dallas, causing us to further delay the boarding of our flight to Portland, and leading to the eventual cancellation of that flight. Because that crew-member was so late, we got caught-up in a weather-related ground stop, eventually causing our pilots to "time-out". So we couldn't get out of Dallas. We would have departed DFW on-time (and before the arrival of the thunderstorm) if not for the lateness of that crew member. The whole time the pilots couldn't tell us whether the flight would be cancelled, and that they couldn't get any information from the airline. By the time we knew the flight was cancelled, all of the flights for the following day were full. So, we didn't even get offered a viable option to get home. The American Airlines customer service desk at DFW was grossly under-staffed. And there were several people who waited in line for four-hours before being helped at that desk. We waited in line for almost 2-hours, until I was able to speak with a customer service agent on the phone (after being on-hold for over an hour). So, once we knew the information about how to get our bag in PDX, and that there weren't any options for flights the next day, we left the line & began searching for another way home. We eventually had to purchase a ticket home on a different airline, in order to get my wife to work on Monday. And we are pursuing a refund of that DFW-PDX leg of the journey. The good news is that the late flight attendant's hair was perfect. And she looked fantastic as she departed the airport & headed back home, while we all hunkered down to sleep in the terminal for the night.

One of the crew members hit me with the car and not even says anything

They need to start flying on time. We lost 2 days of our time because they delayed flight both ways.

As always a terrible experience. AA stole a day from my vacation days planned to be spent with my Family. Response: delays related to weather issues.

The plane was late (as was my flight out from Birmingham the day before)

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

Never happened. Flight was delayed. Had to be re rojyed

Lufthansa is my favorite airline and have flown oversea with them for the past 25 years: i always found them so professional and incredibly efficient from checking in to arrival. I also love their Munich or Frankfurt airports.

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.

Everything about the flight check-in was smooth no line the plane is clean and bathroom

Excellent everywhere but Philly, the most rotten airport in the world.

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

I was put into business class. Wow! My flight attendant was great! The food amazing’

Not so good with their baggage handling as they damaged one of my check in luggage

All went well on the flight, not happy of course with having to pay for a seat and in hold luggage of £50

We never made it onto this flight due to BA's lackluster organisation.

The air hostess were good, cheerful, but I didn't like the boarding. My son and I initially bought our flight tickets, making sure it included 1 luggage and a carry on. Tickets were purchased for British airlines, but we were merged with American Airlines. At checking in our languages, we were told, we don't have luggage prepaid so we had to pay extra $125 each and almost £60 on our way back. I think that's unfair.

Economy seats are so small and compacted so close together that comfort is negatively affected, especially on long flights. However that is due to aircraft design, not anything the airline can do about it.

3/4 bags delayed and 1/4 damaged at the other end. Flight was freezing

Everything you need to know for your flight from Heathrow to San Diego

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