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Cheap flights from London Heathrow Airport to San Diego from £348

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 1/9. 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

Lufthansa Logo
06:55 - 15:25LHR-SAN
16h 30m1 stop
Lufthansa Logo
12:52 - 09:40SAN-LHR
12h 48m1 stop
£440Lufthansa
Find Deal
Wed, 17 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
Wed, 3 Sep - Mon, 22 Sep
Logo
07:25 - 15:25LHR-SAN
16h 00m1 stop
Logo
16:03 - 12:20SAN-LHR
12h 17m1 stop
£468
Find Deal
Mon, 1 Sep - Mon, 15 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
Wed, 10 Sep - Wed, 24 Sep
United Airlines Logo
07:25 - 15:25LHR-SAN
16h 00m1 stop
United Airlines Logo
07:00 - 12:20SAN-LHR
21h 20m1 stop
£469United Airlines
Find Deal
Tue, 9 Sep - Wed, 17 Sep
Logo
06:30 - 17:24LHR-SAN
18h 54m2 stops
Logo
12:45 - 07:10SAN-LHR
34h 25m2 stops
£471
Find Deal
Mon, 24 Nov - Tue, 2 Dec
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
Mon, 25 Aug - Tue, 9 Sep
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
Wed, 1 Oct - Fri, 10 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
Tue, 7 Oct - Mon, 20 Oct
Air Canada Logo
09:30 - 19:35LHR-SAN
18h 05m1 stop
Air Canada Logo
08:10 - 06:30SAN-LHR
14h 20m1 stop
£513Air Canada
Find Deal
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
1 Oct
LHR14:05London Heathrow
18h 10m
2 stops
SAN00:15San Diego
10 Oct
SAN08:10San Diego
14h 20m
1 stop
LHR06:30London Heathrow
£509
Find similar
Air Canada
27 Sept
LHR09:30London Heathrow
18h 05m
1 stop
SAN19:35San Diego
22 Oct
SAN08:10San Diego
14h 20m
1 stop
LHR06:30London Heathrow
£513
Find similar
Air Canada
27 Sept
LHR09:30London Heathrow
18h 05m
1 stop
SAN19:35San Diego
22 Oct
SAN08:10San Diego
14h 20m
1 stop
LHR06:30London Heathrow
£514
Find similar

Lufthansa flights from London Heathrow Airport to San Diego

Our best Lufthansa deals on London Heathrow Airport to San Diego flight tickets
Lufthansa
17 Sept
LHR06:55London Heathrow
16h 30m
1 stop
SAN15:25San Diego
22 Sept
SAN12:52San Diego
12h 48m
1 stop
LHR09:40London Heathrow
£440
Find similar
Lufthansa
3 Sept
LHR07:25London Heathrow
16h 00m
1 stop
SAN15:25San Diego
22 Sept
SAN12:52San Diego
12h 48m
1 stop
LHR09:40London Heathrow
£441
Find similar
Lufthansa
7 Oct
LHR07:25London Heathrow
16h 00m
1 stop
SAN15:25San Diego
20 Oct
SAN10:38San Diego
12h 47m
1 stop
LHR07:25London Heathrow
£442
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 1 August 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

Wed 17/9

06:55-15:25

1 stop16h 30m

San Diego

Mon 22/9

12:52-09:40

1 stop12h 48m

£440

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 3/9

07:25-15:25

1 stop16h 00m

San Diego

Mon 22/9

12:52-09:40

1 stop12h 48m

£441

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 1/9

07:25-15:25

1 stop16h 00m

San Diego

Mon 15/9

16:03-12:20

1 stop12h 17m

£468

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 10/9

07:25-15:25

1 stop16h 00m

San Diego

Wed 24/9

14:21-12:20

2 stops13h 59m

£468

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 9/9

07:25-15:25

1 stop16h 00m

San Diego

Wed 17/9

07:00-12:20

1 stop21h 20m

£469

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 24/11

06:30-17:24

2 stops18h 54m

San Diego

Tue 2/12

12:45-07:10

2 stops34h 25m

£471

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 25/8

11:30-14:50

Nonstop11h 20m

San Diego

Tue 9/9

16:40-12:50

1 stop12h 10m

£501

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 1/10

14:05-00:15

2 stops18h 10m

San Diego

Fri 10/10

08:10-06:30

1 stop14h 20m

£509

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 7/10

15:10-22:24

1 stop15h 14m

San Diego

Mon 20/10

19:50-14:20

Nonstop10h 30m

£510

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 27/9

09:30-19:35

1 stop18h 05m

San Diego

Wed 22/10

08:10-06:30

1 stop14h 20m

£513

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 £497.

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 Friday when prices can be found for as low as £561. Flights from London Heathrow Airport to San Diego on a Sunday will generally be more expensive and average around £625. 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 morning 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 £558. Flying to San Diego in the morning 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 £626. 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 £575 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 £506 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 6% 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 August 2025, prices for London Heathrow Airport to San Diego flights are approximately 1% more expensive 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

£348

Fastest flight time

11h 20m

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 £348. The best return flight deal from London Heathrow Airport to San Diego found on momondo in the last 72 hours is £440.
The fastest flight from London Heathrow Airport to San Diego takes 11h 20m
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 £377Free CancellationRating
7.5
1,465 reviews
Search Air France flights
Air CanadaPriceFrom £392Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £406Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £408Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
LufthansaPriceFrom £412Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
United AirlinesPriceFrom £420Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
KLMPriceFrom £430Free CancellationRating
7.8
1,383 reviews
Search KLM flights
FinnairPriceFrom £437Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
American AirlinesPriceFrom £446Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom £489Free CancellationRating
7.0
2,859 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 1,316 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 £579 (round-trip), much lower than the average airfare cost of £751 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 £895.

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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