Cheap flights from San Diego to London Heathrow Airport from £225

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
2 Apr — 9 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Diego to London Heathrow are usually found in October or November, booked 34 days in advance, depart on a Monday or Sunday and return on a Monday

Cheap flight deals from San Diego to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from San Diego to Heathrow
Explore the most affordable flight options available from San Diego to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 March 2026.

Sun 26/413:10
SAN
-
LHR
1 stop35h 25m
Air Canada
Tue 12/506:50
LHR
-
SAN
2 stops21h 53m
Air Canada
Deal found 1/3£501
Sun 26/413:10
SAN
-
LHR
1 stop33h 25m
Multiple Airlines
Tue 12/507:25
LHR
-
SAN
1 stop16h 00m
Multiple Airlines
Deal found 1/3£504
Sat 15/813:05
SAN
-
LHR
1 stop33h 40m
Virgin Atlantic
Mon 24/817:10
LHR
-
SAN
1 stop26h 40m
Virgin Atlantic
Deal found 2/3£505
Tue 27/1011:50
SAN
-
LHR
1 stop13h 40m
Multiple Airlines
Tue 3/1107:40
LHR
-
SAN
1 stop16h 05m
Multiple Airlines
Deal found 1/3£506
Wed 9/913:53
SAN
-
LHR
2 stops19h 47m
Lufthansa
Wed 16/906:55
LHR
-
SAN
1 stop16h 30m
Lufthansa
Deal found 28/2£507
Wed 25/307:00
SAN
-
LHR
1 stop16h 20m
Virgin Atlantic
Mon 30/319:15
LHR
-
SAN
1 stop24h 35m
Virgin Atlantic
Deal found 28/2£508
Sun 5/415:35
SAN
-
LHR
1 stop15h 25m
Virgin Atlantic
Tue 21/406:30
LHR
-
SAN
1 stop13h 20m
Virgin Atlantic
Deal found 28/2£509
Sun 5/418:10
SAN
-
LHR
1 stop35h 10m
Air Canada
Tue 21/417:40
LHR
-
SAN
1 stop26h 13m
Air Canada
Deal found 28/2£510
Mon 13/412:45
SAN
-
LHR
1 stop16h 35m
Multiple Airlines
Thu 7/506:55
LHR
-
SAN
1 stop16h 30m
Multiple Airlines
Deal found 1/3£510
Tue 12/517:15
SAN
-
LHR
1 stop14h 25m
Lufthansa
Tue 19/507:30
LHR
-
SAN
2 stops21h 42m
Lufthansa
Deal found 1/3£511

Find flight deals from San Diego to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 March 2026.

Round-trip from

£501

One-way from

£225

Popular in

June

Cheapest in

October

Average price

£603

Good round-trip deal

£409 or less

Good one-way deal

£426 or less
Air Canada
  • Air Canada
  • 26/4-12/5
  • 3 total stops
  • 57h 18m total
  • San Diego to London
5/5
  • 5/5
  • 3 total stops
  • 25h 10m total
  • San Diego to London
Highest demand for flights based on searches. 25% potential increase in price (£174 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£25 potential savings vs. average return price).
Average for round-trip flights in March 2026
Price to beat on a round-trip flight from San Diego to London Heathrow.
Price to beat on a one-way flight from San Diego to London Heathrow.

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Diego to Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 3 March 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 7/4

06:15-07:10

1 stop16h 55m

London Heathrow

Tue 21/4

06:30-11:50

1 stop13h 20m

£512

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 29/4

13:20-11:10

1 stop13h 50m

London Heathrow

Fri 8/5

06:55-15:25

1 stop16h 30m

£512

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 4/5

16:04-12:20

1 stop12h 16m

London Heathrow

Tue 12/5

07:25-15:25

1 stop16h 00m

£519

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 29/4

16:09-12:20

1 stop12h 11m

London Heathrow

Tue 12/5

07:25-15:25

1 stop16h 00m

£519

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 7/4

15:35-15:00

1 stop15h 25m

London Heathrow

Tue 21/4

06:30-15:55

2 stops17h 25m

£527

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 5/4

10:40-15:00

1 stop20h 20m

London Heathrow

Tue 21/4

06:30-15:55

2 stops17h 25m

£527

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 15/4

06:15-07:10

2 stops16h 55m

London Heathrow

Wed 22/4

08:55-16:15

1 stop15h 20m

£528

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 1/4

10:40-10:15

1 stop15h 35m

London Heathrow

Wed 15/4

08:55-18:59

2 stops18h 04m

£533

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 5/5

13:14-13:15

2 stops16h 01m

London Heathrow

Wed 13/5

06:15-15:56

2 stops17h 41m

£536

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Fri 24/4

12:45-13:20

1 stop16h 35m

London Heathrow

Tue 5/5

07:25-15:25

1 stop16h 00m

£554

Flights are sorted by cheapest return flights first.

Deals found on 27/2

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

Best time to book a flight from San Diego to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Diego with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to London Heathrow Airport

How far ahead should I book a flight from San Diego to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from San Diego to Heathrow. Price data was last updated on 27 February 2026.

The best time to book flights from San Diego to London Heathrow Airport is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Diego to London Heathrow Airport?

Currently, December is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of £350). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £682). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to LHR?

Find hourly flight availability from San Diego to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Diego to London Heathrow Airport as you normally would.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 3 March 2026.
Read through reviews of airlines operating flights from San Diego to London Heathrow Airport, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

6.7

Comfort

6.8

Crew

7.6

Food

6.4

Boarding

6.9

Entertainment

6.4

Reviews

1 / 20
2.0
Mediocre

Natasha,Feb 2026

SEA - LHR

I already said the thing about the list luggage, which actually this flight.

Overall

6.7

Comfort

6.8

Crew

7.6

Food

6.4

Boarding

6.9

Entertainment

6.4

Reviews

1 / 20
2.0
Mediocre

Natasha,Feb 2026

SEA - LHR

I already said the thing about the list luggage, which actually this flight.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from San Diego to London Heathrow?

    San Diego (SAN) is the airport you will fly out of if you book a flight from San Diego to London Heathrow. You should not have trouble finding flights to London Heathrow from San Diego; the airport handles an average of 5 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights from the San Diego airport to London Heathrow. It is only a 2.6 mi journey to San Diego (SAN) from San Diego’s city center.

  • How long is the flight from San Diego to London Heathrow Airport?

    There are many flights that can get you from San Diego to London Heathrow Airport in 13h 50m. Fly via Virgin Atlantic, United Airlines, or Delta to get the fastest option. Airlines will cover a distance of 5469 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from San Diego to London Heathrow Airport round-trip?

    Our cheapest airline available from San Diego to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £512 on this airline. This flight start at 23% lower than the current average price 3 months from now.

  • What are the most reliable airlines from San Diego to London Heathrow Airport?

    Consider American Airlines (66%), Alaska Airlines (66%) or Aer Lingus (66%) when booking your flight. These represent the most reliable airlines when flying from San Diego to London Heathrow Airport.

  • What are the cheapest flights from San Diego to London Heathrow Airport?

    While on average a flight from San Diego to London Heathrow Airport is generally £513, our data shows the cheapest flight currently is £365. When looking at the most popular route, (San Diego - London Heathrow), you can expect to pay £483 for that flight.

  • Can I find deals for flights from San Diego to Heathrow that include hotel bookings?

    Yes. In addition to deals on San Diego to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Heathrow.

  • Can I find deals for business class flights from San Diego to Heathrow?

    Yes. Cheapflights offers flight deals from San Diego to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Diego to London Heathrow Airport?

    Currently, December is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of £350). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £682). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Wembley
Northampton
Luton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Chelmsford
Ipswich
Swindon
Bedford

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from San Diego to Heathrow

Discover the top airline that operate flights from San Diego to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£512Average£734FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Diego to Heathrow?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from San Diego today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from San Diego to Heathrow?

Cheapflights simply makes it quick and affordable to book flights from San Diego to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from San Diego to Heathrow with no change fees?

Yes, we can. To see specific flights from San Diego to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from San Diego to Heathrow become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Diego today and book when prices fit your budget.

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