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Cheap flights from San Diego to London from £303

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 21/4. 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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Cheap return flights

Enter your travel dates to find the best prices.
Lufthansa Logo
11:00 - 09:40
SAN
-
LHR
14h 40m1 stop
Lufthansa Logo
07:25 - 15:25
LHR
-
SAN
16h 00m1 stop
£479Lufthansa
Wed, 22 Apr - Wed, 29 Apr
Lufthansa Logo
11:05 - 13:30
SAN
-
LHR
18h 25m1 stop
Lufthansa Logo
20:15 - 18:48
LHR
-
SAN
30h 33m2 stops
£480Lufthansa
Mon, 16 Feb - Mon, 23 Feb
Lufthansa Logo
12:16 - 10:15
SAN
-
LHR
13h 59m1 stop
Lufthansa Logo
09:30 - 21:03
LHR
-
SAN
18h 33m2 stops
£481Lufthansa
Wed, 4 Mar - Tue, 17 Mar
Lufthansa Logo
10:50 - 15:40
SAN
-
LHR
20h 50m2 stops
Lufthansa Logo
06:55 - 15:25
LHR
-
SAN
16h 30m1 stop
£483Lufthansa
Mon, 13 Apr - Thu, 30 Apr
JetBlue Logo
21:00 - 20:45
SAN
-
LHR
15h 45m1 stop
JetBlue Logo
07:45 - 19:50
LHR
-
SAN
20h 05m1 stop
£487JetBlue
Sun, 11 Jan - Sun, 18 Jan
Lufthansa Logo
09:55 - 07:25
SAN
-
LHR
13h 30m1 stop
Lufthansa Logo
06:35 - 15:45
LHR
-
SAN
17h 10m1 stop
£488Lufthansa
Tue, 3 Feb - Fri, 13 Feb
Lufthansa Logo
09:55 - 07:25
SAN
-
LHR
13h 30m1 stop
Lufthansa Logo
06:35 - 15:45
LHR
-
SAN
17h 10m1 stop
£488Lufthansa
Tue, 3 Feb - Fri, 13 Feb
Lufthansa Logo
09:55 - 12:00
SAN
-
LHR
18h 05m1 stop
Lufthansa Logo
08:45 - 15:45
LHR
-
SAN
15h 00m1 stop
£489Lufthansa
Tue, 6 Jan - Wed, 28 Jan
Multiple Airlines Logo
06:30 - 07:10
SAN
-
LHR
16h 40m2 stops
Multiple Airlines Logo
06:35 - 15:45
LHR
-
SAN
17h 10m1 stop
£491Multiple Airlines
Mon, 26 Jan - Fri, 6 Feb
Lufthansa Logo
11:00 - 09:40
SAN
-
LHR
14h 40m1 stop
Lufthansa Logo
06:30 - 19:57
LHR
-
SAN
21h 27m2 stops
£491Lufthansa
Tue, 7 Apr - Thu, 23 Apr

Lufthansa flights from San Diego to London Heathrow Airport

Our best Lufthansa deals on San Diego to London Heathrow Airport flight tickets
Lufthansa
22 Apr
SAN11:00San Diego
14h 40m
1 stop
LHR09:40London Heathrow
29 Apr
LHR07:25London Heathrow
16h 00m
1 stop
SAN15:25San Diego
£479
Find similar
Lufthansa
16 Feb
SAN11:05San Diego
18h 25m
1 stop
LHR13:30London Heathrow
23 Feb
LHR20:15London Heathrow
30h 33m
2 stops
SAN18:48San Diego
£480
Find similar
Lufthansa
18 Feb
SAN14:10San Diego
13h 05m
1 stop
LHR11:15London Heathrow
23 Feb
LHR20:15London Heathrow
30h 33m
2 stops
SAN18:48San Diego
£481
Find similar

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
16 Feb
SAN12:45San Diego
15h 05m
1 stop
LHR11:50London Heathrow
25 Feb
LHR06:35London Heathrow
17h 10m
1 stop
SAN15:45San Diego
£488
Find similar
United Airlines
6 Jan
SAN07:45San Diego
15h 40m
1 stop
LHR07:25London Heathrow
30 Jan
LHR06:35London Heathrow
17h 10m
1 stop
SAN15:45San Diego
£492
Find similar
United Airlines
7 Jan
SAN09:55San Diego
13h 30m
1 stop
LHR07:25London Heathrow
13 Jan
LHR11:10London Heathrow
19h 55m
2 stops
SAN23:05San Diego
£499
Find similar

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 18 December 2025.
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

Wed 22/4

11:00-09:40

1 stop14h 40m

London Heathrow

Wed 29/4

07:25-15:25

1 stop16h 00m

£479

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 16/2

11:05-13:30

1 stop18h 25m

London Heathrow

Mon 23/2

20:15-18:48

2 stops30h 33m

£480

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 4/3

12:16-10:15

1 stop13h 59m

London Heathrow

Tue 17/3

09:30-21:03

2 stops18h 33m

£481

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 13/4

10:50-15:40

2 stops20h 50m

London Heathrow

Thu 30/4

06:55-15:25

1 stop16h 30m

£483

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 11/1

21:00-20:45

1 stop15h 45m

London Heathrow

Sun 18/1

07:45-19:50

1 stop20h 05m

£487

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 3/2

09:55-07:25

1 stop13h 30m

London Heathrow

Fri 13/2

06:35-15:45

1 stop17h 10m

£488

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 3/2

09:55-07:25

1 stop13h 30m

London Heathrow

Fri 13/2

06:35-15:45

1 stop17h 10m

£488

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 6/1

09:55-12:00

1 stop18h 05m

London Heathrow

Wed 28/1

08:45-15:45

1 stop15h 00m

£489

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 26/1

06:30-07:10

2 stops16h 40m

London Heathrow

Fri 6/2

06:35-15:45

1 stop17h 10m

£490

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 7/4

11:00-09:40

1 stop14h 40m

London Heathrow

Thu 23/4

06:30-19:57

2 stops21h 27m

£491

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 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 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 £537. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from San Diego averaging around £538.

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 £481. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £1,022.

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 morning. momondo users have found flights departing from San Diego to London Heathrow Airport in the morning for as low as £596. 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 £699 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 £664 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 £561 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 35% 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 December 2025, prices for San Diego to London Heathrow Airport flights are approximately 29% cheaper 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

Fastest flight time

10h 35m

Direct flights

Every day
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 £510Free CancellationRating
6.7
7,585 reviews
Search British Airways flights

  • British Airways Flights From San Diego to London Heathrow Airport

    Across 5 British Airways flights from San Diego to London Heathrow Airport this week, the average price was £704, with the best British Airways deals starting from £510 round-trip. 7,585 users have rated British Airways on momondo, with an average score of 6.7/10.

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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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