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Cheap flights from San Diego to London from £212

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to London departing on 16/2. 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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0 bags

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Cheap return flights

Enter your travel dates to find the best prices.
Lufthansa Logo
17:15 - 18:25
SAN
-
LHR
17h 10m
1 stop
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
£478Lufthansa
Tue, 28 Apr - Tue, 5 May
JetBlue Logo
20:34 - 06:55
SAN
-
LHR
26h 21m
1 stop
JetBlue Logo
09:20 - 19:24
LHR
-
SAN
18h 04m
1 stop
£479JetBlue
Wed, 18 Feb - Mon, 23 Feb
Lufthansa Logo
17:15 - 17:05
SAN
-
LHR
15h 50m
1 stop
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
£479Lufthansa
Wed, 22 Apr - Tue, 5 May
Multiple Airlines Logo
08:15 - 13:20
SAN
-
LHR
21h 05m
1 stop
Multiple Airlines Logo
06:55 - 15:25
LHR
-
SAN
16h 30m
1 stop
£480Multiple Airlines
Tue, 5 May - Wed, 20 May
Lufthansa Logo
11:01 - 17:05
SAN
-
LHR
22h 04m
2 stops
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
£481Lufthansa
Mon, 13 Apr - Thu, 30 Apr
United Airlines Logo
06:30 - 09:40
SAN
-
LHR
19h 10m
1 stop
United Airlines Logo
06:35 - 16:45
LHR
-
SAN
17h 10m
1 stop
£481United Airlines
Sun, 22 Feb - Tue, 10 Mar
Lufthansa Logo
11:01 - 15:40
SAN
-
LHR
20h 39m
2 stops
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
£482Lufthansa
Mon, 13 Apr - Thu, 30 Apr
United Airlines Logo
06:30 - 09:40
SAN
-
LHR
19h 10m
1 stop
United Airlines Logo
06:35 - 16:45
LHR
-
SAN
17h 10m
1 stop
£483United Airlines
Sun, 22 Feb - Tue, 10 Mar
Finnair Logo
10:50 - 11:40
SAN
-
LHR
16h 50m
1 stop
Finnair Logo
18:10 - 20:37
LHR
-
SAN
33h 27m
2 stops
£484Finnair
Mon, 23 Feb - Mon, 9 Mar
Lufthansa Logo
17:15 - 20:45
SAN
-
LHR
19h 30m
1 stop
Lufthansa Logo
07:25 - 17:19
LHR
-
SAN
17h 54m
2 stops
£484Lufthansa
Tue, 21 Apr - Tue, 5 May

United Airlines flights from San Diego to London Heathrow Airport

Our best United Airlines deals on San Diego to London Heathrow Airport flight tickets
United Airlines
22 Feb
SAN06:30San Diego
19h 10m
1 stop
LHR09:40London Heathrow
10 Mar
LHR06:35London Heathrow
17h 10m
1 stop
SAN16:45San Diego
£483
United Airlines
13 Apr
SAN12:45San Diego
16h 35m
1 stop
LHR13:20London Heathrow
30 Apr
LHR07:25London Heathrow
16h 00m
1 stop
SAN15:25San Diego
£496
United Airlines
22 Apr
SAN08:00San Diego
14h 55m
1 stop
LHR06:55London Heathrow
5 May
LHR06:55London Heathrow
16h 30m
1 stop
SAN15:25San Diego
£499

American Airlines flights from San Diego to London Heathrow Airport

Our best American Airlines deals on San Diego to London Heathrow Airport flight tickets
American Airlines
22 Feb
SAN16:45San Diego
12h 30m
1 stop
LHR13:15London Heathrow
10 Mar
LHR12:50London Heathrow
11h 20m
SAN17:10San Diego
£504
American Airlines
22 Feb
SAN16:45San Diego
12h 30m
1 stop
LHR13:15London Heathrow
10 Mar
LHR12:50London Heathrow
11h 20m
SAN17:10San Diego
£505
American Airlines
18 Feb
SAN12:45San Diego
13h 15m
1 stop
LHR10:00London Heathrow
23 Feb
LHR12:50London Heathrow
11h 20m
SAN16:10San Diego
£545

momondo Fare Finder

 
Customise your flight search to find flights from San Diego to London Heathrow Airport 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 6 February 2026.
Use the filters below to find and compare flights from San Diego to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 28/4

17:15-18:25

1 stop17h 10m

London Heathrow

Tue 5/5

07:25-15:25

1 stop16h 00m

£478

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 18/2

20:34-06:55

1 stop26h 21m

London Heathrow

Mon 23/2

09:20-19:24

1 stop18h 04m

£478

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 22/4

17:15-17:05

1 stop15h 50m

London Heathrow

Tue 5/5

07:25-15:25

1 stop16h 00m

£479

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 5/5

08:15-13:20

1 stop21h 05m

London Heathrow

Wed 20/5

06:55-15:25

1 stop16h 30m

£480

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 13/4

11:01-17:05

2 stops22h 04m

London Heathrow

Thu 30/4

07:25-15:25

1 stop16h 00m

£481

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 22/2

06:30-09:40

1 stop19h 10m

London Heathrow

Tue 10/3

06:35-16:45

1 stop17h 10m

£481

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 13/4

11:01-15:40

2 stops20h 39m

London Heathrow

Thu 30/4

07:25-15:25

1 stop16h 00m

£482

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 22/2

06:30-09:40

1 stop19h 10m

London Heathrow

Tue 10/3

06:35-16:45

1 stop17h 10m

£483

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 23/2

10:50-11:40

1 stop16h 50m

London Heathrow

Mon 9/3

18:10-20:37

2 stops33h 27m

£484

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 21/4

17:15-20:45

1 stop19h 30m

London Heathrow

Tue 5/5

07:25-17:19

2 stops17h 54m

£484

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

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

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 typical price of a round-trip flight between San Diego and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

In general, October is the cheapest month to fly from San Diego to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £530. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from San Diego averaging around £534.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from San Diego is on a Monday. momondo users have found tickets for Monday departures for as low as £503. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £990.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from San Diego to London Heathrow Airport in the afternoon for as low as £682. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £695 on average. Flights to London Heathrow Airport from San Diego in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

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

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

You are more likely to see cheaper flights to London Heathrow Airport from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £661 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Diego for as low as £559 on momondo.

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

There are 3 cabin classes available to choose from on San Diego to London Heathrow 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 San Diego to London Heathrow Airport flights?

You could potentially save up to 10% on your flight if you consider stops on a San Diego to London Heathrow Airport flight.

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

As of February 2026, prices for San Diego to London Heathrow Airport flights are approximately 9% more expensive when compared to flights at the same time last year.

When to book flights from San Diego to London Heathrow Airport

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

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

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

Best price found

£370

Fastest flight time

10h 35m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from San Diego in the past 72 hours is £370. The best return flight deal from San Diego to London Heathrow Airport found on momondo in the last 72 hours is £497.
The fastest flight from San Diego to London Heathrow Airport takes 10h 35m
Direct flights go from San Diego to London Heathrow Airport every day.
Search flight deals

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

    San Diego and London Heathrow are 5468.7 mi apart from one another. 10h 35m is a normal flight duration for this route.

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

    Prices for flights from San Diego Airport to London Heathrow Airport are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from San Diego to London Heathrow Airport

Compare and see reviews for airlines that fly from San Diego to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £505Free CancellationRating
6.7
7,716 reviews
Search British Airways flights

  • British Airways Flights From San Diego to London Heathrow Airport

    Across 7 British Airways flights from San Diego to London Heathrow Airport this week, the average price was £745, with the best British Airways deals starting from £505 round-trip. 7,716 users have rated British Airways on momondo, with an average score of 6.7/10.

Travelling to a place near London?

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Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Diego to London. momondo saves you time and could save you money on your trip.

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

Flights from San Diego to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 San Diego to London.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from San Diego and alert you when they change.

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