LHR - SAN

£444 Find Cheap Flights from London Heathrow Airport to San Diego – Compare and Save

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 24/8. 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.
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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£593
Typical prices: £553-£710
Scandinavian Airlines
Sat 5/9Sun 13/9
LHR - SAN • 2 stops
Cheapest direct flights
£611
Typical prices: £561-£710
British Airways
Wed 23/9Wed 30/9
LHR - SAN • Direct
Top airlines
Cheapest • from £593 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Direct flights
You can fly direct with British Airways. Average duration is 11h 20m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
Avoid delays
Most punctual • 83% on-time
Best time • Fewest delays
Insights
Insights
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Insights
Top stopover airports
Cheapest • Avg £551 (return)
Shortest trip • 13h 30m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 26% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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Flight Deals
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Expert advice
Flight 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

Sat, 5 Sep - Sun, 13 Sep
Scandinavian Airlines Logo
06:40 - 23:00
LHR
-
SAN
24h 20m
2 stops
Scandinavian Airlines Logo
07:00 - 17:40
SAN
-
LHR
26h 40m
2 stops
£593Scandinavian Airlines
Sat, 5 Sep - Sun, 13 Sep
Scandinavian Airlines Logo
06:40 - 23:27
LHR
-
SAN
24h 47m
3 stops
Scandinavian Airlines Logo
07:00 - 16:00
SAN
-
LHR
25h 00m
2 stops
£596Scandinavian Airlines
Sat, 5 Sep - Wed, 9 Sep
Scandinavian Airlines Logo
06:40 - 23:00
LHR
-
SAN
24h 20m
2 stops
Scandinavian Airlines Logo
07:30 - 16:00
SAN
-
LHR
24h 30m
2 stops
£599Scandinavian Airlines
Fri, 13 Nov - Sun, 6 Dec
Scandinavian Airlines Logo
06:40 - 22:55
LHR
-
SAN
24h 15m
2 stops
Scandinavian Airlines Logo
10:00 - 17:40
SAN
-
LHR
23h 40m
2 stops
£599Scandinavian Airlines
Wed, 9 Sep - Wed, 16 Sep
Multiple Airlines Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
Multiple Airlines Logo
08:00 - 06:55
SAN
-
LHR
14h 55m
1 stop
£600Multiple Airlines
Mon, 7 Sep - Mon, 21 Sep
Multiple Airlines Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
Multiple Airlines Logo
10:40 - 08:30
SAN
-
LHR
13h 50m
1 stop
£601Multiple Airlines
Mon, 7 Sep - Mon, 14 Sep
Lufthansa Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
Lufthansa Logo
17:15 - 17:05
SAN
-
LHR
15h 50m
1 stop
£602Lufthansa
Mon, 14 Sep - Mon, 28 Sep
Lufthansa Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
Lufthansa Logo
17:15 - 15:40
SAN
-
LHR
14h 25m
1 stop
£602Lufthansa
Mon, 7 Sep - Mon, 14 Sep
Lufthansa Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
Lufthansa Logo
17:15 - 17:05
SAN
-
LHR
15h 50m
1 stop
£603Lufthansa
Wed, 7 Oct - Wed, 21 Oct
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
Lufthansa Logo
15:56 - 14:10
SAN
-
LHR
14h 14m
1 stop
£604Lufthansa
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.

How much is a return flight from London Heathrow Airport to San Diego?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to San Diego departing in September.

Flight prices are below average for this route right now.

Flights to San Diego from London Heathrow Airport usually cost between £605 and £1,071 in September.
The lowest price found in the past 5 days was £593 on Scandinavian Airlines (5 Sept–13 Sept).

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 Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from London Heathrow Airport to San Diego. For your return ticket, we recommend flying on a Sunday and avoiding Fridays 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 February, where tickets cost £508 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is £839 and £790 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.

No, with an average price for the route of £697, prices are generally cheapest when you fly direct.

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 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Expert advice

Expert advice for your flight from Heathrow to San Diego

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Duncan Madden

Duncan Madden

Expert on British Airways

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.

Gabriel Leigh

Gabriel Leigh

Expert on Finnair

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.

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

Low season

February

Cheapest flight

£444
Best time to beat the crowds (26% less expensive on average)
Most popular time to fly and prices are also 11% 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 5 days, the lowest price for a flight from London Heathrow Airport to San Diego was £444 for a one-way ticket and £593 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 777-300ER 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?

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

  • 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, KLM or Finnair?

    The two airlines most popular with KAYAK users for flights from London to San Diego are KLM and Finnair. With an average price for the route of £788 and an overall rating of 7.8, KLM is the most popular choice. Finnair is also a great choice for the route, with an average price of £647 and an overall rating of 7.6.

  • 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 £416 or less one-way and £646 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

British Airways

British Airways

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Thursday

British Airways

British Airways

Friday

British Airways

British Airways

Saturday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Direct returns

San Diego to London Heathrow

Monday

British Airways

British Airways

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Thursday

British Airways

British Airways

Friday

British Airways

British Airways

Saturday

British Airways

British Airways

Sunday

British Airways

British Airways

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.
7.4
United AirlinesOverall score based on 10042 reviews
7.7Boarding
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
Airline reviews

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

8.0 ExcellentSheldon, Jul 2026
IAD - SAN
Read more United Airlines reviews

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

UA594 was delayed multiple times. I ended up getting picked up so I can make it in time for work 6AM on Monday, 7/6/2026

The flight attendants were very rude, beyond comprehension. I took a business class from London to SFO for the first time on United. When I asked for a second piece of bread during dinner, the serving attendant threw a 3rd bread on my plate and said, “here. You can have this one too”! I couldn’t believe the rudeness of the attendant. Most all attendants were very rude, unhelpful, sing the food was absolutely disgusting. Never fly United internationally in business class. My flight back to SFO was a nightmare!!

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Was a pain having to leave the plane and reboard but glad the plane was fixed

The senior flight attendants were amazing. Totally different vibe from other carriers. Easy 10 hour flight in Business Class. Great food. Good humor as well.

Connecting flights were poor,especially in Naples.our Lufthansa air bus was a joke.way too small for that long of a flight.no room at all.couldn’t even get out of the seats to move around or go to the bathrooms.we thought we were getting an actual air bus,double decker.i will never fly that long in a plane like that again.kind of misleading to call it an air bus.we actually had more room on our buses that we used.

For a 22 minute flight all you expect is for it to be safe and comfortable

Liked Seat space in Premium Plus Disliked delay, poor management of boarding groups, missed meal at landing.

The plane was up-to-date, and the free wi-fi was very much appreciated! All of the ports functioned well, and the entertainment choices made the flight much more enjoyable. One of the flight attendants was unfriendly, but the flight was enjoyable overall.

The seat when "flat" was not flat and pad was too thin to cover it.

The flight was completely full. Crew was not happy. Everyone was rude and brusque. Travelling with an arm in a cast and seating in the first row of economy cabin (in front of the separation) I needed help retrieving my tray for the meal. A staff member literally threw the tray on my lap, without helping to take out the tray. Boarding was messy, with 300 people waiting in an encloses space with low ceiling. I will try to avoid AA next time I have a long flight.

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

I flew Business Class. Rory, one of the Cabin stewards, was attentive, explained the menu, provided appropriate drinks. was

Great thanks - a whole row to myself. Good food but film selection not great.

The boarding process was such a chaos with everyone crowding at the gates. There was no structure. The onboard crew were fantastic and very good.

Somehow I got “offloaded” even though I had my boarding pass and was in transit Food is horrible Staff were nice and cheerful No headphones were provided on 11 hours flight

The staff were very helpful with lots of refreshments on offer. The toilets were clean. The seats were comfortable and entertainment was good. No complaints, it was excellent.

amazing! they were so kind and allowed us to sit on empty seats so we could stretch our legs and sleep good. Food is amazing as well plus dessert in the middle of the flight!

The security line at JFK was one of the longest I’ve ever experienced - probably 45 minutes. I don’t know if JetBlue has control over it, but it detracted from the overall experience. Entertainment had good options, but the volume control was a bit small to tap on and the screen had a fair amount of interference blips. Clearer picture would have been better.

Whole experience was poor. Delayed 2 hours. Lied about the delays. Was all jet blues fault and tried to blame on air traffic control. Sent out other let trips and wouldn't allow people to switch aircraft.

It was fine for what it was. It’s not luxury travel but it was efficient, for the most part. Having my carry-on transferred into luggage however, was unwelcome.

I was seated next to an autistic child who was out of control and had a child behind me kicking my seat for most of the trip. I will never fly JetBlue again. Ever. I don't care how cheap it is. It's terrible.

Great price, easy check in, love the free drinks and snacks, and nice crew. The only negative part was waiting for your seat assignment 5 minutes before boarding, and the seats are a bit uncomfortable.

The regular feedback of any changes to our flights. The Jetblue staff were very helpful. Our flights were great. Lots of leg room!

It took an hour to get my bag after landing. Not exaggerating

Everything was good instead change the gates! I missed my first flight because it was changed the gate and I didn’t know!

almost 4 hour delay as they over booked and had to wait for 8-10 volunteers to agree to travel next day.

We liked the flight, but not in JFK, not in Gatwick it is no lounge and this was surprising and disappointing. I think by now it is understandable that COVID will not go away and why it should not be business lounge?

Good and they are leaving at time and arriving on time

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

The food was straight up bad not gonna lie, seats are uncomfortable so I had to re-adjust my self most of the time, delayed our arrival time by alot.

Other than problems with checking in and uploading passport info everything was great. It would be nice to be able to manually input passport info. Often while traveling the bandwidth has problems uploading pictures

Boarding was a zoo. London ground crew was useless. Poor communication regarding where to line up. We were group 2, and everyone was jammed in together. Ground crew didn’t seem to care.

Horrible flight attendant in back of economy that screamed at me, have already reported to United. Horrible food - for Gluten free, why would you assume the person is vegetarian? I was served some kind of horrible curry bean paste and multiple cold rolls and soggy vegetables with no seasoning... um no!

Knowing that there was weather in other areas of the world, united airlines should have planned better than it did. The flight was 5 hours late. United has no regard for its customers

Flight itself fine, big problem with KAYAK. Revised e-ticket sent in July stated departure LHR 10:55, arrival SFO 13:45. (a believable local arrival time given flight length and time difference). When we got to LHR there was no 10:55 flight to SFO and were advised that in fact flight LH2473 was arriving in MUNICH at 13:45pm, and that we would need to get a connecting flight arriving in SFO at 18:55 local time - over 5 hours later than expected. 1) you the booking agent made an error on the revised e-ticket you sent, omitting the Munich stopover and incorrect SFO arrival time. 2) I booked a DIRECT flight and 3) we had to cancel plans this end as a result, even though the team at LHR did a great job moving us to a later direct flight getting us in 2 hours earlier than the flight from munich would have.

Wasn’t overbooked, so it was nice having an empty seat next to me. Appreciated the on time flight. Food was really bad though. Received stale vegetarian sandwich with just a slice of cheese and shredded carrots on it. Very strange and not tasty. I didn’t order a vegetarian meal either way of my trip but received all vegetarian meals because they said that’s all they have available.

I was sent an email that said my card payment was not verified. When I spoke to an agent , he said my card was not verified and the flight I thought I had to booked was no longer available so I booked another flight on another airline(United). Later I got flight updates , etc., concerning my supposed first flight. So if I was charged for this flight on British Airways/American airlines, I need a refund.

Generally very good. I think their service is better than some other big names I used to travel with. Their food variety is second to none - and you can place order beforehand. Their seating design is a bit awkward for service, I'd say. Flight attendants must be tall enough - long legs and arms - to reach the window seat passenger while crossing over the isle passenger. Also appreciated the variety on entertainment.

Lovely big plane. Excellent take off and landing. Cabin crew were so nice. Flight in time no delays

Los Angeles to London. 25th of April 2026. Business class. I was flying backwards with a complete stranger snoring next to me. In Business class. Males and females, strangers lying next to each other. Seats were backwards. I paid for comfort. I got dizziness and stress.

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

There was a delay for the San Francisco-London flight, but we were all informed via text and email. The staff was very friendly and nice and the food was good. I do recommend that the airline offer something without eggs or something vegan for the vegetarian meal option. A lot of Indians are lacto-vegetarian, while some could be allergic to eggs/dairy.

All service prior to the flight was terrible: online check-in not working, no customer service tel,, multiple airport scanners not working, A huge mess.

Service of the crews were great. Food on flight was very greasy, and salty.

Terrible, broken window and the blinded didn’t shut during the entire flight. Nobody could sleep

Horrible. Crew is not helpful. Lounge is sub standard and overcrowded. Getting to your plane is underwhelming “via a bus”. Worst experience I have had.

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

Information on your arrival and departure airports