SAN - LHR

£257 Find Cheap Flights from San Diego to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to Heathrow departing on 29/7. 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

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to London, as well as popular online travel agencies
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Flights Deals
Expert advice
Useful Info
Flights Deals

Cheap Flight Deals from San Diego to Heathrow (SAN-LHR)

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

Recent return flight deals from San Diego to Heathrow

KAYAK's recommended return flight deals from the most popular airlines that fly from San Diego to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
Iberia Logo
19:50 - 14:20SAN-LHR
10h 30mdirect
Iberia Logo
14:55 - 18:00LHR-SAN
11h 05mdirect
£453Iberia
Find Deal
Mon, 4 Aug - Wed, 20 Aug
Iberia Logo
15:26 - 14:25SAN-LHR
14h 59m1 stop
Iberia Logo
14:55 - 18:00LHR-SAN
11h 05mdirect
£456Iberia
Find Deal
Mon, 4 Aug - Wed, 20 Aug
Delta Logo
06:30 - 11:25SAN-LHR
20h 55m1 stop
Delta Logo
06:15 - 16:06LHR-SAN
17h 51m2 stops
£477Delta
Find Deal
Mon, 4 Aug - Wed, 20 Aug
Delta Logo
06:15 - 06:45SAN-LHR
16h 30m2 stops
Delta Logo
06:15 - 16:06LHR-SAN
17h 51m2 stops
£480Delta
Find Deal
Mon, 4 Aug - Wed, 20 Aug
Finnair Logo
14:48 - 12:30SAN-LHR
13h 42m1 stop
Finnair Logo
09:30 - 23:32LHR-SAN
22h 02m2 stops
£487Finnair
Find Deal
Wed, 20 Aug - Thu, 4 Sep
Air Canada Logo
08:10 - 06:30SAN-LHR
14h 20m1 stop
Air Canada Logo
06:50 - 19:38LHR-SAN
20h 48m2 stops
£498Air Canada
Find Deal
Wed, 20 Aug - Wed, 27 Aug
Air Canada Logo
08:10 - 06:30SAN-LHR
14h 20m1 stop
Air Canada Logo
06:50 - 19:38LHR-SAN
20h 48m2 stops
£500Air Canada
Find Deal
Wed, 20 Aug - Wed, 27 Aug
Finnair Logo
10:52 - 09:00SAN-LHR
14h 08m1 stop
Finnair Logo
18:10 - 17:41LHR-SAN
31h 31m2 stops
£509Finnair
Find Deal
Mon, 13 Oct - Mon, 20 Oct
British Airways Logo
16:40 - 11:25SAN-LHR
10h 45mdirect
British Airways Logo
14:55 - 18:00LHR-SAN
11h 05mdirect
£511British Airways
Find Deal
Tue, 30 Sep - Wed, 8 Oct
British Airways Logo
14:54 - 12:30SAN-LHR
13h 36m1 stop
British Airways Logo
15:40 - 21:40LHR-SAN
14h 00m1 stop
£521British Airways
Find Deal
Tue, 30 Sep - Wed, 8 Oct
Expert advice

Expert advice for your flight from San Diego to Heathrow

 
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 specific 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
Finnair

Finnair's Economy Comfort offers extra legroom for a small fee, enhancing long-haul comfort.


Finnair's A350 features lower cabin altitude and higher humidity, improving passenger comfort on long flights.

Read more about Finnairby Gabriel Leigh
Iberia

Iberia's business class offers all-aisle access and private suites on A350-900 for restful long-haul flights.


Iberia's Premium Economy provides wider seats, adjustable headrests, and USB power outlets for long-haul comfort.

Read more about Iberiaby Marisa Garcia
British Airways

British Airways' premium economy offers 18 cm extra legroom, enhancing comfort on long-haul flights.


BA's Executive Club loyalty programme offers Avios points, enhancing value for frequent flyers.

Read more about British Airwaysby Duncan Madden
Our travel experts
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
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Read more
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
Useful Info

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

Get data-powered insights and trends into flights from San Diego to Heathrow 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 San Diego to London Heathrow Airport?

The average price of all round-trip flights from San Diego to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from San Diego to London Heathrow Airport, look for departures on Sundays and avoid leaving on a Wednesday, as it's usually the priciest day. When flying back from London Heathrow Airport, Friday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego to London Heathrow Airport, 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 San Diego to London Heathrow Airport is January, where tickets cost £531 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,014 and £893 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Diego to London Heathrow Airport, 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 San Diego to London Heathrow Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.
Find deals

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

Low season

January

High season

June

Cheapest flight

£257
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (49% more expensive on average)
Flight from San Diego to London Heathrow Airport

When to book flights from San Diego to Heathrow

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

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

    In the last 3 days, the lowest price for a flight from San Diego to London Heathrow Airport was £345 for a one-way ticket and £608 for a return.

  • Which airlines offer Wi-Fi service onboard planes from San Diego to London Heathrow Airport?

    All the following airlines offer inflight Wi-Fi service on the San Diego to London Heathrow Airport flight route: American Airlines, United Airlines, Lufthansa, KLM, Delta, Vueling, Iberia, and SWISS.

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

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

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

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

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

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

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

    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 San Diego to London Heathrow Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from San Diego 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 San Diego to London Heathrow Airport?

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

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

    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 London Heathrow Airport from San Diego 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 San Diego to London Heathrow Airport

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

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

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

Direct departures

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, +2 more

Aer Lingus, Alaska Airlines, +3 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

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, +2 more

Aer Lingus, Alaska Airlines, +3 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
See more direct flights

Top airline flying from San Diego to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from San Diego to London. 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 San Diego to Heathrow? 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.
6.6
British AirwaysOverall score based on 6837 reviews
6.3Food
6.8Boarding
7.6Crew
6.4Entertainment
6.7Comfort
Airline reviews

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

6.0 GoodAnonymous, Apr 2025SEA - LHR
Read more British Airways reviews

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Experience was good. Could have been better if we didn’t have to board an hour before the flight to ghana and miss relaxing time in the lounge. That process was very stressful

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

Information on your arrival and departure airports

Heathrow (LHR)
San Diego (SAN)

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