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Cheap flights from London Heathrow Airport to San Diego from $399

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 4/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Heathrow Airport to San Diego

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from London Heathrow Airport to San Diego.
Air Canada Logo
9:30 am - 7:50 pmLHR-SAN
18h 20m1 stop
Air Canada Logo
8:00 am - 6:30 amSAN-LHR
14h 30m1 stop
$532Air Canada
Find Deal
Wed, Apr 30 - Wed, May 7
Air Canada Logo
9:30 am - 7:45 pmLHR-SAN
18h 15m1 stop
Air Canada Logo
12:55 pm - 11:50 amSAN-LHR
14h 55m1 stop
$539Air Canada
Find Deal
Mon, May 5 - Mon, May 12
United Airlines Logo
7:25 am - 6:28 pmLHR-SAN
19h 03m2 stops
United Airlines Logo
11:20 am - 9:40 amSAN-LHR
14h 20m1 stop
$609United Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 24
United Airlines Logo
7:25 am - 3:25 pmLHR-SAN
16h 00m1 stop
United Airlines Logo
8:50 am - 9:40 amSAN-LHR
16h 50m1 stop
$611United Airlines
Find Deal
Mon, Apr 21 - Mon, May 5
British Airways Logo
11:30 am - 2:50 pmLHR-SAN
11h 20mnonstop
British Airways Logo
4:40 pm - 11:25 amSAN-LHR
10h 45mnonstop
$619British Airways
Find Deal
Wed, Sep 10 - Wed, Sep 24
British Airways Logo
11:30 am - 2:50 pmLHR-SAN
11h 20mnonstop
British Airways Logo
2:49 pm - 12:15 pmSAN-LHR
13h 26m1 stop
$620British Airways
Find Deal
Fri, May 9 - Sun, May 11
American Airlines Logo
11:30 am - 2:50 pmLHR-SAN
11h 20mnonstop
American Airlines Logo
4:31 pm - 12:50 pmSAN-LHR
12h 19m1 stop
$655American Airlines
Find Deal
Mon, Apr 21 - Mon, May 5
American Airlines Logo
11:30 am - 2:50 pmLHR-SAN
11h 20mnonstop
American Airlines Logo
4:40 pm - 11:25 amSAN-LHR
10h 45mnonstop
$664American Airlines
Find Deal
Mon, Apr 21 - Mon, May 5
Iberia Logo
4:25 pm - 11:56 pmLHR-SAN
15h 31m1 stop
Iberia Logo
7:50 pm - 2:20 pmSAN-LHR
10h 30mnonstop
$670Iberia
Find Deal
Mon, Apr 21 - Mon, May 5
Iberia Logo
4:25 pm - 11:56 pmLHR-SAN
15h 31m1 stop
Iberia Logo
7:50 pm - 2:20 pmSAN-LHR
10h 30mnonstop
$729Iberia
Find Deal
Sun, Jun 15 - Sun, Jun 22

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
Apr 30
LHR9:30 amLondon Heathrow
18h 20m
1 stop
SAN7:50 pmSan Diego
May 7
SAN8:00 amSan Diego
14h 30m
1 stop
LHR6:30 amLondon Heathrow
Air Canada
May 5
LHR9:30 amLondon Heathrow
18h 15m
1 stop
SAN7:45 pmSan Diego
May 12
SAN12:55 pmSan Diego
14h 55m
1 stop
LHR11:50 amLondon Heathrow
Air Canada
May 1
LHR9:30 amLondon Heathrow
18h 15m
1 stop
SAN7:45 pmSan Diego
May 13
SAN8:00 amSan Diego
14h 30m
1 stop
LHR6:30 amLondon Heathrow

Lufthansa flights from London Heathrow Airport to San Diego

Our best Lufthansa deals on London Heathrow Airport to San Diego flight tickets
Lufthansa
May 5
LHR6:55 amLondon Heathrow
16h 30m
1 stop
SAN3:25 pmSan Diego
May 12
SAN2:30 pmSan Diego
12h 40m
1 stop
LHR11:10 amLondon Heathrow
Lufthansa
May 6
LHR7:25 amLondon Heathrow
16h 00m
1 stop
SAN3:25 pmSan Diego
May 13
SAN5:15 pmSan Diego
14h 25m
1 stop
LHR3:40 pmLondon Heathrow
Lufthansa
Apr 28
LHR7:25 amLondon Heathrow
16h 00m
1 stop
SAN3:25 pmSan Diego
May 17
SAN4:00 pmSan Diego
14h 10m
1 stop
LHR2:10 pmLondon Heathrow

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 are unable to visit San Diego during the month of January, then departing from London Heathrow Airport during the month February is also very affordable. Most momondo users find prices during this month for around $658.

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 Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $701. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $808. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

What is the cheapest time of day to depart on your flight to San Diego?

The cheapest time of day to fly to San Diego is in the afternoon when flights can be purchased for as low as $727. Flights in the morning are often more expensive with an average ticket price of $774.

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 26 weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $769 when searching 26 weeks out.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 $670 on momondo.

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

There are 3 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.

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

As of April 2025, prices for London Heathrow Airport to San Diego flights are approximately 24% 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 round-trip 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

$399

Fastest flight time

11h 05m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in San Diego

1 airport
The best one-way flight to San Diego from London Heathrow Airport in the past 72 hours is $399. The best round-trip flight deal from London Heathrow Airport to San Diego found on momondo in the last 72 hours is $532.
The fastest flight from London Heathrow Airport to San Diego takes 11h 05m
Direct flights go from London Heathrow Airport to San Diego on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. Airlines offering direct flights are: Finnair, Aer Lingus and Iberia.
There is 1 airport near San Diego: San Diego (SAN)

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

    A flight from London Heathrow to San Diego will travel around 5468.7 mi. A reasonable flight in good conditions will take 11h 05m.

  • 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 are updated daily.

  • 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 necessary travel and health documents for your San Diego Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • 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
United AirlinesPriceFrom $523Free CancellationRating
7.4
8,615 reviews
Search United Airlines flights
British AirwaysPriceFrom $553Free CancellationRating
6.6
6,713 reviews
Search British Airways flights
IberiaPriceFrom $576Free CancellationRating
7.0
2,655 reviews
Search Iberia flights
American AirlinesPriceFrom $579Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
  • American Airlines Flights From London Heathrow Airport to San Diego

    American Airlines is one of the most popular airlines flying from London Heathrow Airport to San Diego, operating 13 flights/week on average for this route. A good American Airlines flight deal for London Heathrow Airport to San Diego starts from $579 round-trip, up to an average price of $748. Our users have rated American Airlines at 7.2/10.

  • British Airways Flights From London Heathrow Airport to San Diego

    Across 6,715 British Airways reviews on momondo, the average score is 6.6/10. British Airways flies from London Heathrow Airport to San Diego about 13 times each week, with ticket deals ranging from $553 to $743. Price data is based on momondo searches in the last 72 hours.


Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Chula Vista
Coronado
El Cajon
Julian
National City
La Mesa
Lemon Grove
Imperial Beach
San Ysidro
Borrego Springs
Poway
Alpine
Santee

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Diego from London.

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

momondo does allow users to show only those flights to San Diego from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Diego from London.

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

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


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