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Cheap flights from London Heathrow Airport to San Diego from £431

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to San Diego departing on 15/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to San Diego

Cheap return flights

Air Canada Logo
18:00 - 17:24LHR-SAN
30h 24m2 stops
Air Canada Logo
18:10 - 07:10SAN-LHR
29h 00m2 stops
£466Air Canada
Find Deal
Tue, 28 Oct - Tue, 4 Nov
Air Canada Logo
08:30 - 19:35LHR-SAN
19h 05m2 stops
Air Canada Logo
08:10 - 11:50SAN-LHR
19h 40m2 stops
£467Air Canada
Find Deal
Thu, 2 Oct - Sun, 5 Oct
Logo
14:05 - 11:31LHR-SAN
29h 26m2 stops
Logo
11:08 - 11:50SAN-LHR
16h 42m2 stops
£468
Find Deal
Wed, 1 Oct - Wed, 8 Oct
United Airlines Logo
06:55 - 15:25LHR-SAN
16h 30m1 stop
United Airlines Logo
09:54 - 12:00SAN-LHR
18h 06m1 stop
£473United Airlines
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Tue, 21 Oct - Fri, 7 Nov
British Airways Logo
08:20 - 15:53LHR-SAN
15h 33m1 stop
British Airways Logo
19:50 - 14:20SAN-LHR
10h 30mdirect
£474British Airways
Find Deal
Sat, 27 Sep - Wed, 22 Oct
British Airways Logo
08:20 - 15:53LHR-SAN
15h 33m1 stop
British Airways Logo
16:40 - 11:25SAN-LHR
10h 45mdirect
£475British Airways
Find Deal
Sat, 27 Sep - Wed, 22 Oct
United Airlines Logo
06:30 - 15:51LHR-SAN
17h 21m2 stops
United Airlines Logo
16:05 - 12:20SAN-LHR
12h 15m1 stop
£476United Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Finnair Logo
15:35 - 19:23LHR-SAN
34h 48m2 stops
Finnair Logo
15:05 - 06:20SAN-LHR
31h 15m2 stops
£478Finnair
Find Deal
Tue, 28 Oct - Fri, 14 Nov
Virgin Atlantic Logo
14:30 - 23:06LHR-SAN
16h 36m1 stop
Virgin Atlantic Logo
22:10 - 10:00SAN-LHR
27h 50m1 stop
£484Virgin Atlantic
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Tue, 14 Oct - Sun, 19 Oct
Finnair Logo
08:20 - 20:20LHR-SAN
20h 00m1 stop
Finnair Logo
19:50 - 14:20SAN-LHR
10h 30mdirect
£485Finnair
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Sat, 27 Sep - Wed, 22 Oct

Air Canada flights from London Heathrow Airport to San Diego

Our best Air Canada deals on London Heathrow Airport to San Diego flight tickets
Air Canada
28 Oct
LHR18:00London Heathrow
30h 24m
2 stops
SAN17:24San Diego
4 Nov
SAN18:10San Diego
29h 00m
2 stops
LHR07:10London Heathrow
£466
Find similar
Air Canada
2 Oct
LHR08:30London Heathrow
19h 05m
2 stops
SAN19:35San Diego
5 Oct
SAN08:10San Diego
19h 40m
2 stops
LHR11:50London Heathrow
£467
Find similar
Air Canada
15 Nov
LHR11:10London Heathrow
19h 10m
2 stops
SAN22:20San Diego
22 Nov
SAN22:30San Diego
24h 00m
2 stops
LHR06:30London Heathrow
£473
Find similar

British Airways flights from London Heathrow Airport to San Diego

Our best British Airways deals on London Heathrow Airport to San Diego flight tickets
British Airways
27 Sept
LHR08:20London Heathrow
15h 33m
1 stop
SAN15:53San Diego
22 Oct
SAN19:50San Diego
10h 30m
LHR14:20London Heathrow
£474
Find similar
British Airways
27 Sept
LHR08:20London Heathrow
15h 33m
1 stop
SAN15:53San Diego
22 Oct
SAN16:40San Diego
10h 45m
LHR11:25London Heathrow
£475
Find similar
British Airways
14 Oct
LHR08:20London Heathrow
15h 24m
1 stop
SAN15:44San Diego
20 Oct
SAN19:50San Diego
10h 30m
LHR14:20London Heathrow
£481
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 15 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 28/10

18:00-17:24

2 stops30h 24m

San Diego

Tue 4/11

18:10-07:10

2 stops29h 00m

£466

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 2/10

08:30-19:35

2 stops19h 05m

San Diego

Sun 5/10

08:10-11:50

2 stops19h 40m

£467

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 1/10

14:05-11:31

2 stops29h 26m

San Diego

Wed 8/10

11:08-11:50

2 stops16h 42m

£468

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 21/10

06:55-15:25

1 stop16h 30m

San Diego

Fri 7/11

09:54-12:00

1 stop18h 06m

£473

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 27/9

08:20-15:53

1 stop15h 33m

San Diego

Wed 22/10

19:50-14:20

Nonstop10h 30m

£474

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 27/9

08:20-15:53

1 stop15h 33m

San Diego

Wed 22/10

16:40-11:25

Nonstop10h 45m

£475

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 14/10

06:30-15:51

2 stops17h 21m

San Diego

Tue 21/10

16:05-12:20

1 stop12h 15m

£476

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 28/10

15:35-19:23

2 stops34h 48m

San Diego

Fri 14/11

15:05-06:20

2 stops31h 15m

£478

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 14/10

14:30-23:06

1 stop16h 36m

San Diego

Sun 19/10

22:10-10:00

1 stop27h 50m

£484

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 27/9

08:20-20:20

1 stop20h 00m

San Diego

Wed 22/10

19:50-14:20

Nonstop10h 30m

£485

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

How to get the cheapest flight ticket from London Heathrow Airport to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Diego?

If you don’t want to visit San Diego in January, then you should wait until February to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £487.

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from London Heathrow Airport to San Diego is on a Saturday when prices can be found for as low as £549. Flights from London Heathrow Airport to San Diego on a Sunday will generally be more expensive and average around £593. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to San Diego?

In the evening is the cheapest time of day to fly from London Heathrow Airport to San Diego when you can find flight prices for as low as £549. Flying to San Diego in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the afternoon because they tend to be around £644. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest London Heathrow to San Diego flight route?

Fly from London Heathrow to San Diego for the best London Heathrow - San Diego flight prices

How far in advance should I book a flight to San Diego?

You are more likely to see cheaper flights to San Diego from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around £563 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from London Heathrow Airport for as low as £496 on momondo.

What cabin class options are available on London Heathrow to San Diego flights?

There are 4 cabin classes available to choose from on London Heathrow to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to San Diego flights?

You could potentially save up to 34% on your flight if you consider stops on a London Heathrow Airport to San Diego flight.

How have London Heathrow Airport to San Diego flight prices changed over time?

As of September 2025, prices for London Heathrow Airport to San Diego flights are approximately 24% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to San Diego (LHR to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to San Diego

Best price found

£673

Fastest flight time

11h 05m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from London Heathrow Airport in the past 72 hours is £673. The best return flight deal from London Heathrow Airport to San Diego found on momondo in the last 72 hours is £553.
The fastest flight from London Heathrow Airport to San Diego takes 11h 05m
Direct flights go from London Heathrow Airport to San Diego every day.
There is 1 airport near San Diego: San Diego (SAN)
Search flight deals

  • How far is London Heathrow to San Diego by plane?

    London Heathrow and San Diego are 5468.7 mi apart from one another. In terms of flight time, this usually takes a little over 11h 20m.

  • When did momondo last update prices for flights from London Heathrow Airport to San Diego Airport?

    Prices for flights from London Heathrow Airport to San Diego Airport were last updated today.

  • How many operators does momondo search for flights from London Heathrow Airport to San Diego Airport?

  • How old do you have to be to fly from London Heathrow Airport to San Diego Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The travel and health documents required for your trip to San Diego Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Diego Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London Heathrow Airport to San Diego?

  • What is the most popular airline from London Heathrow Airport to San Diego?

Best airlines flying from London Heathrow Airport to San Diego

Compare and see reviews for airlines that fly from London Heathrow Airport to San Diego with momondo
Airline
Rating
Free Cancellation
Price
Air FrancePriceFrom £368Free CancellationRating
7.4
1,469 reviews
Search Air France flights
Air CanadaPriceFrom £383Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £396Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £399Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
LufthansaPriceFrom £411Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
FinnairPriceFrom £415Free CancellationRating
7.6
1,323 reviews
Search Finnair flights
United AirlinesPriceFrom £418Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
KLMPriceFrom £421Free CancellationRating
7.8
1,385 reviews
Search KLM flights
American AirlinesPriceFrom £435Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom £474Free CancellationRating
7.0
2,924 reviews
Search Iberia flights

  • Finnair Flights From London Heathrow Airport to San Diego

    Finnair flies from London Heathrow Airport to San Diego around 5 times per week, with 1,323 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London Heathrow Airport to San Diego in the last 72 hours was £563 (round-trip), much lower than the average airfare cost of £755 for Finnair flights on this route.

  • American Airlines Flights From London Heathrow Airport to San Diego

    Another popular option for London Heathrow Airport to San Diego flights is American Airlines (7.2/10, 10,000 ratings). American Airlines flies from London Heathrow Airport to San Diego around 13 times per week, with deals starting from £590 round-trip and rising to an average price of around £876.

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
Chula Vista

Why use momondo?

Why should I use momondo to find a flight deal from London to San Diego?

Finding the right flight to San Diego from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Diego quick and easy, saving you time and money.

Can I find flights from London to San Diego with flexible booking policies on momondo?

All flight searches from London to San Diego on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to San Diego?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to San Diego.

I’m not ready to book a flight from London to San Diego right now. Can momondo alert me if prices change?

Price alerts on flights to San Diego from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Diego trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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