LHR - SAN

£281 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 5/5. 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, 0 bags

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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Everything you should know

Cheapest return fare
£480
Overall average: £545
United Airlines
Thu 10/9Sat 12/9
LHR - SAN • 2 stops
Cheapest direct flights
£588
Typical prices: £494-£633
British Airways
Mon 7/9Thu 17/9
LHR - SAN • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Finnair's A350 offers a more comfortable journey.
BA's premium economy provides extra legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from £480 (return)
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with British Airways. Average duration is 11h 20m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 84% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £401 (return)
Shortest trip • 13h 25m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 20% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to San Diego!
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

Thu, 10 Sep - Sat, 12 Sep
United Airlines Logo
14:10 - 20:45
LHR
-
SAN
38h 35m
2 stops
United Airlines Logo
17:00 - 10:10
SAN
-
LHR
33h 10m
1 stop
£480United Airlines
Sat, 23 May - Sat, 23 May
United Airlines Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
United Airlines Logo
18:27 - 07:25
SAN
-
LHR
28h 58m
1 stop
£482United Airlines
Sat, 23 May - Sat, 23 May
United Airlines Logo
08:30 - 18:32
LHR
-
SAN
18h 02m
2 stops
United Airlines Logo
20:32 - 07:25
SAN
-
LHR
26h 53m
2 stops
£513United Airlines
Tue, 14 Apr - Tue, 5 May
Multiple Airlines Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
Multiple Airlines Logo
08:00 - 10:40
SAN
-
LHR
18h 40m
1 stop
£543Multiple Airlines
Wed, 15 Apr - Mon, 27 Apr
Multiple Airlines Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
Multiple Airlines Logo
06:20 - 11:55
SAN
-
LHR
21h 35m
1 stop
£546Multiple Airlines
Tue, 21 Apr - Mon, 4 May
Multiple Airlines Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
Multiple Airlines Logo
08:00 - 10:40
SAN
-
LHR
18h 40m
1 stop
£550Multiple Airlines
Wed, 22 Apr - Tue, 28 Apr
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
Lufthansa Logo
14:10 - 11:55
SAN
-
LHR
13h 45m
1 stop
£552Lufthansa
Wed, 22 Apr - Tue, 28 Apr
Lufthansa Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
Lufthansa Logo
06:20 - 11:55
SAN
-
LHR
21h 35m
1 stop
£555Lufthansa
Mon, 13 Apr - Tue, 5 May
Lufthansa Logo
19:10 - 15:25
LHR
-
SAN
28h 15m
1 stop
Lufthansa Logo
14:14 - 11:55
SAN
-
LHR
13h 41m
1 stop
£559Lufthansa
Mon, 13 Apr - Thu, 7 May
Lufthansa Logo
07:30 - 17:16
LHR
-
SAN
17h 46m
2 stops
Lufthansa Logo
17:15 - 17:05
SAN
-
LHR
15h 50m
1 stop
£561Lufthansa
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 Monday, 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 Saturdays 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 £491 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is £791 and £745 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 £701, 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 3 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 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 seasonFebruary
Cheapest flight£281
Best time to beat the crowds (21% 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 £281 for a one-way ticket and £480 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 airlines offer Wi-Fi service onboard planes from London Heathrow Airport to San Diego?

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

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

    The Boeing 777 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 £787 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 £629 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 £380 or less one-way and £701 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.
7.5
Virgin AtlanticOverall score based on 680 reviews
8.2Crew
7.3Comfort
6.9Food
7.6Entertainment
7.7Boarding
Airline reviews

My seat 3G did not go down fully and the buttons were not working properly

8.0 ExcellentAditya, Feb 2026
LHR - JFK
Read more Virgin Atlantic reviews

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

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

It was amazing. I had several upgraded seats on my flight out. Everything went smooth with no delays.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Flight attendants were friendly & good service, food sucks, seats uncomfortable, not many Asian movies or shows flying from Hong Kong

Flight attendants had a little attitude. Food tastes no good.

Overall we had a good experience during our flight from San Francisco to Houston.

it was a very short flight so my expectations were low.

Good flight. However, when booked flight with United, assumed the layover included by United in San Francisco of 1 hr and 40 minutes was sufficient . Not so and would recommend at least 2 hours or more. Needed to go through US immigration (very long lineups), then pick up bags, take all the way to another terminal, running because we did not have sufficient time. We made the flight because they held the door for us but luggage didn’t follow.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

Older airplane with worn out seats. No entertainment system at all. Connecting to Wi-Fi was problematic and hit and miss.

An delay of almost 3 hours while passengers were already in the plane kept us very uncomfortable. The food was also very limited. A bad experience overall.

I understand that there is a catering issue - water should be the minimum stock. During the flight, not once that the attendants came through with water. The conversations in the kitchen were very loud and they were swearing. I do not expect any white glove service, at the minimum, we should be cordial. It was almost an inconveniece that we were on the flight. And it made us feel if you even dare question us, we'll make you deplane.

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

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.

We are too tired and frustrated to comment politely at this point

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.

Flight, food and crew were all good, friendly and very satisfactory.

Lost luggage after 2 days no word leaving on cruise no stuff or clothes

Staff's did their best to make everyone comfortable and I appreciate them for it

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.

Patrick and the whole crew were amazing! Hope to have this team for all my European trips.

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

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.

They don’t give information on why a flight is delayed in a timely manner. Very frustrating.

The plane (Mitsubishi CRJ) felt old, creaking and not very new. The crew was okay. Hot water provision was broken so hot beverages could't be served.

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.)

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

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

Information on your arrival and departure airports