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Cheap flights from San Diego to London from £173

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 30/9. 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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Cheap return flights

Logo
13:20 - 11:00SAN-LHR
13h 40m1 stop
Logo
06:30 - 12:00LHR-SAN
13h 30m1 stop
£409
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Tue, 7 Oct - Tue, 14 Oct
Logo
16:01 - 17:50SAN-LHR
17h 49m2 stops
Logo
08:45 - 15:45LHR-SAN
15h 00m1 stop
£410
Find Deal
Wed, 12 Nov - Thu, 20 Nov
British Airways Logo
19:00 - 12:35SAN-LHR
10h 35mdirect
British Airways Logo
12:50 - 16:10LHR-SAN
11h 20mdirect
£410British Airways
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Mon, 27 Oct - Tue, 4 Nov
Air Canada Logo
18:10 - 11:50SAN-LHR
33h 40m1 stop
Air Canada Logo
14:30 - 17:24LHR-SAN
34h 54m1 stop
£411Air Canada
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Tue, 4 Nov - Wed, 26 Nov
Delta Logo
09:59 - 08:55SAN-LHR
14h 56m2 stops
Delta Logo
06:30 - 12:00LHR-SAN
13h 30m1 stop
£412Delta
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Wed, 24 Sep - Thu, 2 Oct
British Airways Logo
11:41 - 08:15SAN-LHR
12h 34m1 stop
British Airways Logo
12:50 - 16:10LHR-SAN
11h 20mdirect
£413British Airways
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Wed, 12 Nov - Thu, 20 Nov
Air Canada Logo
22:30 - 07:10SAN-LHR
25h 40m2 stops
Air Canada Logo
14:30 - 17:24LHR-SAN
34h 54m1 stop
£414Air Canada
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Sun, 26 Oct - Wed, 5 Nov
United Airlines Logo
20:11 - 09:35SAN-LHR
29h 24m2 stops
United Airlines Logo
08:30 - 11:31LHR-SAN
35h 01m1 stop
£416United Airlines
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Mon, 22 Sep - Wed, 1 Oct
Delta Logo
14:05 - 13:30SAN-LHR
15h 25m1 stop
Delta Logo
09:00 - 19:08LHR-SAN
18h 08m2 stops
£416Delta
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Mon, 6 Oct - Wed, 22 Oct
United Airlines Logo
14:21 - 11:10SAN-LHR
12h 49m1 stop
United Airlines Logo
11:25 - 20:49LHR-SAN
17h 24m2 stops
£417United Airlines
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Wed, 24 Sep - Wed, 1 Oct

British Airways flights from San Diego to London Heathrow Airport

Our best British Airways deals on San Diego to London Heathrow Airport flight tickets
British Airways
27 Oct
SAN19:00San Diego
10h 35m
LHR12:35London Heathrow
4 Nov
LHR12:50London Heathrow
11h 20m
SAN16:10San Diego
£410
Find similar
British Airways
21 Sept
SAN16:40San Diego
12h 10m
1 stop
LHR12:50London Heathrow
9 Oct
LHR14:55London Heathrow
11h 05m
SAN18:00San Diego
£413
Find similar
British Airways
4 Nov
SAN12:43San Diego
13h 17m
1 stop
LHR10:00London Heathrow
26 Nov
LHR12:50London Heathrow
11h 20m
SAN16:10San Diego
£415
Find similar

Air Canada flights from San Diego to London Heathrow Airport

Our best Air Canada deals on San Diego to London Heathrow Airport flight tickets
Air Canada
22 Sept
SAN08:10San Diego
17h 25m
1 stop
LHR09:35London Heathrow
3 Oct
LHR09:30London Heathrow
18h 05m
1 stop
SAN19:35San Diego
£410
Find similar
Air Canada
4 Nov
SAN18:10San Diego
33h 40m
1 stop
LHR11:50London Heathrow
26 Nov
LHR14:30London Heathrow
34h 54m
1 stop
SAN17:24San Diego
£411
Find similar
Air Canada
26 Oct
SAN22:30San Diego
25h 40m
2 stops
LHR07:10London Heathrow
5 Nov
LHR14:30London Heathrow
34h 54m
1 stop
SAN17:24San Diego
£414
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 12 September 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

Tue 7/10

13:20-11:00

1 stop13h 40m

London Heathrow

Tue 14/10

06:30-12:00

1 stop13h 30m

£409

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 12/11

16:01-17:50

2 stops17h 49m

London Heathrow

Thu 20/11

08:45-15:45

1 stop15h 00m

£410

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 27/10

19:00-12:35

Nonstop10h 35m

London Heathrow

Tue 4/11

12:50-16:10

Nonstop11h 20m

£410

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 4/11

18:10-11:50

1 stop33h 40m

London Heathrow

Wed 26/11

14:30-17:24

1 stop34h 54m

£411

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 24/9

09:59-08:55

2 stops14h 56m

London Heathrow

Thu 2/10

06:30-12:00

1 stop13h 30m

£412

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 12/11

11:41-08:15

1 stop12h 34m

London Heathrow

Thu 20/11

12:50-16:10

Nonstop11h 20m

£413

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 26/10

22:30-07:10

2 stops25h 40m

London Heathrow

Wed 5/11

14:30-17:24

1 stop34h 54m

£414

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 22/9

20:11-09:35

2 stops29h 24m

London Heathrow

Wed 1/10

08:30-11:31

1 stop35h 01m

£416

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 6/10

14:05-13:30

1 stop15h 25m

London Heathrow

Wed 22/10

09:00-19:08

2 stops18h 08m

£416

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 24/9

14:21-11:10

1 stop12h 49m

London Heathrow

Wed 1/10

11:25-20:49

2 stops17h 24m

£417

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, January 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 £539. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from San Diego averaging around £541.

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 £475. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Wednesday is £1,071.

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 £588. 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 afternoon when prices are £716 on average. Flights to London Heathrow Airport from San Diego in the afternoon 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 £665 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 £550 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 13% 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 September 2025, prices for San Diego to London Heathrow Airport flights are approximately 26% 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 30m

Direct flights

Every day
The fastest flight from San Diego to London Heathrow Airport takes 10h 30m
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 30m 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 £506Free CancellationRating
6.6
7,361 reviews
Search British Airways flights

  • British Airways Flights From San Diego to London Heathrow Airport

    Across 13 British Airways flights from San Diego to London Heathrow Airport this week, the average price was £956, with the best British Airways deals starting from £686 round-trip. 7,361 users have rated British Airways on momondo, with an average score of 6.6/10.

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.

An easier way to manage your London Heathrow Airport trip

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