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Cheap flights from San Diego to London from $249

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 10/4. 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 round-trip flights

Lufthansa Logo
4:11 pm - 2:10 pmSAN-LHR
13h 59m1 stop
Lufthansa Logo
7:25 am - 3:25 pmLHR-SAN
16h 00m1 stop
$498Lufthansa
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Tue, Sep 9 - Tue, Sep 16
Virgin Atlantic Logo
1:22 pm - 1:10 pmSAN-LHR
15h 48m1 stop
Virgin Atlantic Logo
11:45 am - 12:00 pmLHR-SAN
32h 15m1 stop
$507Virgin Atlantic
Find Deal
Mon, Aug 18 - Wed, Sep 3
Air Canada Logo
8:10 am - 9:35 amSAN-LHR
17h 25m1 stop
Air Canada Logo
9:30 am - 7:35 pmLHR-SAN
18h 05m1 stop
$511Air Canada
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Sun, Oct 5 - Wed, Oct 22
United Airlines Logo
9:45 am - 7:25 amSAN-LHR
13h 40m1 stop
United Airlines Logo
7:25 am - 3:25 pmLHR-SAN
16h 00m1 stop
$521United Airlines
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Mon, Aug 18 - Wed, Sep 3
British Airways Logo
4:40 pm - 11:25 amSAN-LHR
10h 45mnonstop
British Airways Logo
11:30 am - 2:50 pmLHR-SAN
11h 20mnonstop
$531British Airways
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Mon, Sep 22 - Wed, Oct 8
British Airways Logo
7:50 pm - 2:20 pmSAN-LHR
10h 30mnonstop
British Airways Logo
11:30 am - 2:50 pmLHR-SAN
11h 20mnonstop
$532British Airways
Find Deal
Wed, Oct 8 - Wed, Oct 22
United Airlines Logo
9:45 am - 7:25 amSAN-LHR
13h 40m1 stop
United Airlines Logo
7:25 am - 3:25 pmLHR-SAN
16h 00m1 stop
$537United Airlines
Find Deal
Mon, Aug 18 - Wed, Sep 3
Delta Logo
10:00 am - 11:10 amSAN-LHR
17h 10m2 stops
Delta Logo
6:30 am - 12:00 pmLHR-SAN
13h 30m1 stop
$556Delta
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Wed, Aug 13 - Thu, Aug 21
Delta Logo
9:44 am - 9:50 amSAN-LHR
16h 06m1 stop
Delta Logo
6:15 am - 3:54 pmLHR-SAN
17h 39m2 stops
$560Delta
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Mon, Aug 18 - Wed, Sep 3
Iberia Logo
2:57 pm - 12:15 pmSAN-LHR
13h 18m1 stop
Iberia Logo
12:30 pm - 9:16 pmLHR-SAN
16h 46m1 stop
$568Iberia
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Wed, Aug 13 - Wed, Aug 20

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
Aug 18
SAN9:45 amSan Diego
13h 40m
1 stop
LHR7:25 amLondon Heathrow
Sep 3
LHR7:25 amLondon Heathrow
16h 00m
1 stop
SAN3:25 pmSan Diego
$521
Find similar
United Airlines
Aug 13
SAN10:43 amSan Diego
15h 42m
1 stop
LHR10:25 amLondon Heathrow
Aug 21
LHR7:25 amLondon Heathrow
16h 00m
1 stop
SAN3:25 pmSan Diego
$534
Find similar
United Airlines
Aug 18
SAN9:45 amSan Diego
13h 40m
1 stop
LHR7:25 amLondon Heathrow
Sep 3
LHR7:25 amLondon Heathrow
16h 00m
1 stop
SAN3:25 pmSan Diego
$537
Find similar

Delta flights from San Diego to London Heathrow Airport

Our best Delta deals on San Diego to London Heathrow Airport flight tickets
Delta
Aug 13
SAN10:00 amSan Diego
17h 10m
2 stops
LHR11:10 amLondon Heathrow
Aug 21
LHR6:30 amLondon Heathrow
13h 30m
1 stop
SAN12:00 pmSan Diego
$556
Find similar
Delta
Aug 18
SAN9:44 amSan Diego
16h 06m
1 stop
LHR9:50 amLondon Heathrow
Sep 3
LHR6:15 amLondon Heathrow
17h 39m
2 stops
SAN3:54 pmSan Diego
$560
Find similar
Delta
Aug 6
SAN6:15 amSan Diego
16h 30m
1 stop
LHR6:45 amLondon Heathrow
Aug 26
LHR6:15 amLondon Heathrow
17h 39m
2 stops
SAN3:54 pmSan Diego
$561
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 2, 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 9/9

4:11 pm-2:10 pm

1 stop13h 59m

London Heathrow

Tue 9/16

7:25 am-3:25 pm

1 stop16h 00m

$498

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 8/18

1:22 pm-1:10 pm

1 stop15h 48m

London Heathrow

Wed 9/3

11:45 am-12:00 pm

1 stop32h 15m

$507

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 10/5

8:10 am-9:35 am

1 stop17h 25m

London Heathrow

Wed 10/22

9:30 am-7:35 pm

1 stop18h 05m

$511

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 8/18

9:45 am-7:25 am

1 stop13h 40m

London Heathrow

Wed 9/3

7:25 am-3:25 pm

1 stop16h 00m

$521

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 9/22

4:40 pm-11:25 am

Nonstop10h 45m

London Heathrow

Wed 10/8

11:30 am-2:50 pm

Nonstop11h 20m

$531

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 10/8

7:50 pm-2:20 pm

Nonstop10h 30m

London Heathrow

Wed 10/22

11:30 am-2:50 pm

Nonstop11h 20m

$532

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 8/18

9:45 am-7:25 am

1 stop13h 40m

London Heathrow

Wed 9/3

7:25 am-3:25 pm

1 stop16h 00m

$537

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 8/13

10:00 am-11:10 am

2 stops17h 10m

London Heathrow

Thu 8/21

6:30 am-12:00 pm

1 stop13h 30m

$556

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 8/18

9:44 am-9:50 am

1 stop16h 06m

London Heathrow

Wed 9/3

6:15 am-3:54 pm

2 stops17h 39m

$560

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 8/13

2:57 pm-12:15 pm

1 stop13h 18m

London Heathrow

Wed 8/20

12:30 pm-9:16 pm

1 stop16h 46m

$568

Flights are sorted by cheapest round-trip 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?

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from San Diego, with most prices found around $719. If you’re not able to fly to London Heathrow Airport in January, then October is your next best option. Flight prices from San Diego to London Heathrow Airport during October average around $723.

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

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $884. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $1,023.

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 at noon. momondo users have found flights departing from San Diego to London Heathrow Airport at noon for as low as $908. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $972.

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 $904 when searching weeks out. 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 $731 on momondo.

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

There are 4 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 27% 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 August 2025, prices for San Diego to London Heathrow Airport flights are approximately 35% 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 round-trip 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

$249

Fastest flight time

10h 30m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from San Diego in the past 72 hours is $249. The best round-trip flight deal from San Diego to London Heathrow Airport found on momondo in the last 72 hours is $498.
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?

    London Heathrow is 5468.7 mi away from San Diego. Typically, this will take 10h 30m by plane in normal conditions.

  • 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 refresh daily.

  • 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Diego Airport to London Heathrow Airport.

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

    The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable 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
JetBluePriceFrom $580Free CancellationRating
7.2
2,915 reviews
Search JetBlue flights
KLMPriceFrom $580Free CancellationRating
7.8
1,384 reviews
Search KLM flights
DeltaPriceFrom $586Free CancellationRating
8.0
7,983 reviews
Search Delta flights
IberiaPriceFrom $589Free CancellationRating
7.0
2,862 reviews
Search Iberia flights
LufthansaPriceFrom $590Free CancellationRating
6.8
7,276 reviews
Search Lufthansa flights
FinnairPriceFrom $595Free CancellationRating
7.6
1,317 reviews
Search Finnair flights
American AirlinesPriceFrom $607Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Virgin AtlanticPriceFrom $620Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $621Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
British AirwaysPriceFrom $626Free CancellationRating
6.6
7,224 reviews
Search British Airways flights

  • Finnair Flights From San Diego to London Heathrow Airport

    Finnair is one of the most popular airlines flying from San Diego to London Heathrow Airport, operating 5 flights/week on average for this route. A good Finnair flight deal for San Diego to London Heathrow Airport starts from $595 round-trip, up to an average price of $692. Our users have rated Finnair at 7.6/10.

  • American Airlines Flights From San Diego to London Heathrow Airport

    $607 is the best American Airlines flight deal from San Diego to London Heathrow Airport found on momondo over the last 72 hours. The average American Airlines ticket price found was closer to $906, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 10,000 user reviews) flies into London Heathrow Airport from San Diego 13 times in an average week so prices can vary.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Slough
Luton
Dartford
Guildford
Milton Keynes
Stansted
Hayes
Crawley
Croydon
Chelmsford
Salisbury
Ilford
Brentwood
Colchester
Stratford-upon-Avon
Folkestone
Swindon

Why use momondo?

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

It is quick and easy to find San Diego to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo enables you to select and highlight flights to London from San Diego with this policy.

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

momondo helps you find the best flight between San Diego and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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 not ready to book a flight from San Diego to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Heathrow Airport trip

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