Cheap flights from London Heathrow Airport to San Diego from £440

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to San Diego are usually found in February or January, booked 57 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to San Diego

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Diego
Explore the most affordable flight options available from Heathrow to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 June 2026.

Tue 14/708:55
LHR
-
SAN
1 stop14h 44m
British Airways
Tue 4/819:40
SAN
-
LHR
Nonstop10h 40m
British Airways
Deal found 9/6£701
Tue 18/808:40
LHR
-
SAN
1 stop18h 48m
JetBlue
Sun 6/920:40
SAN
-
LHR
1 stop25h 50m
JetBlue
Deal found 9/6£705
Thu 9/714:45
LHR
-
SAN
1 stop14h 37m
British Airways
Fri 24/719:40
SAN
-
LHR
Nonstop10h 40m
British Airways
Deal found 8/6£706
Thu 2/708:55
LHR
-
SAN
1 stop14h 44m
British Airways
Thu 9/719:40
SAN
-
LHR
Nonstop10h 40m
British Airways
Deal found 8/6£708
Wed 1/714:25
LHR
-
SAN
1 stop16h 14m
British Airways
Fri 10/716:45
SAN
-
LHR
Nonstop10h 45m
British Airways
Deal found 5/6£708
Sat 13/617:00
LHR
-
SAN
1 stop14h 56m
Alaska Airlines
Sat 20/606:18
SAN
-
LHR
1 stop24h 47m
Alaska Airlines
Deal found 5/6£709
Wed 30/1213:00
LHR
-
SAN
2 stops30h 08m
Air Canada
Thu 7/107:05
SAN
-
LHR
1 stop20h 45m
Air Canada
Deal found 7/6£710
Mon 12/1009:50
LHR
-
SAN
2 stops17h 47m
Multiple Airlines
Wed 4/1114:46
SAN
-
LHR
1 stop13h 34m
Multiple Airlines
Deal found 5/6£711
Sat 13/614:45
LHR
-
SAN
1 stop17h 03m
British Airways
Mon 15/613:19
SAN
-
LHR
1 stop13h 11m
British Airways
Deal found 5/6£711
Thu 20/820:25
LHR
-
SAN
1 stop27h 00m
Multiple Airlines
Mon 7/912:30
SAN
-
LHR
1 stop34h 05m
Multiple Airlines
Deal found 5/6£712
Wed 23/1220:25
LHR
-
SAN
1 stop23h 45m
Virgin Atlantic
Tue 5/122:10
SAN
-
LHR
1 stop24h 10m
Virgin Atlantic
Deal found 5/6£714
Fri 16/1015:05
LHR
-
SAN
2 stops30h 39m
Air Canada
Mon 2/1119:41
SAN
-
LHR
2 stops27h 29m
Air Canada
Deal found 4/6£714

Find flight deals from Heathrow to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Diego (SAN). 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 9 June 2026.

Round-trip from

£706

One-way from

£440

Popular in

July

Cheapest in

February

Average price

£662

Good round-trip deal

£723 or less
British Airways
  • British Airways
  • 9/7-24/7
  • 1 total stop
  • 25h 17m total
  • London to San Diego
British Airways
  • British Airways
  • 1/9
  • Nonstop
  • 11h 20m total
  • London to San Diego
Highest demand for flights based on searches. 7% potential increase in price (£42 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Average for round-trip flights in June 2026
Price to beat on a round-trip flight from London Heathrow to San Diego.

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to San Diego 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 9 June 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 10/10

09:30-19:43

1 stop18h 13m

San Diego

Mon 2/11

22:30-20:35

1 stop14h 05m

£721

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 21/11

06:40-22:55

3 stops24h 15m

San Diego

Fri 27/11

08:00-18:30

2 stops26h 30m

£742
Fastest return journey

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 23/6

14:30-17:50

Nonstop11h 20m

San Diego

Thu 2/7

16:32-14:25

1 stop13h 53m

£744

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 10/11

10:20-22:55

2 stops20h 35m

San Diego

Tue 24/11

15:59-21:35

3 stops21h 36m

£763

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 31/8

08:40-20:16

2 stops19h 36m

San Diego

Sat 5/9

17:01-20:10

2 stops19h 09m

£765

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 9/7

06:15-15:56

2 stops17h 41m

San Diego

Wed 22/7

10:54-13:05

2 stops18h 11m

£770

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sun 26/7

12:30-20:50

1 stop16h 20m

San Diego

Thu 10/9

12:54-10:30

1 stop13h 36m

£823

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 18/7

17:00-23:08

1 stop14h 08m

San Diego

Thu 23/7

17:35-15:05

1 stop13h 30m

£851
Cheapest one-way

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 5/9

07:25-15:25

1 stop16h 00m

£444

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 24/8

07:30-00:29

3 stops24h 59m

£462

Flights are sorted by cheapest return flights first.

Deals found on 6/6

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Heathrow 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 London Heathrow Airport to San Diego

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

The best time to book flights from London Heathrow Airport to San Diego is 31 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 London Heathrow Airport to San Diego?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of £483). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of £792). 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 LHR to SAN?

Find hourly flight availability from Heathrow to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 June 2026.

When flying from London Heathrow Airport to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from London Heathrow Airport to San Diego?

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated 9 June 2026.
Read reviews from past customers who have flown with United Airlines,American Airlines, andJetBlue from London Heathrow Airport to San Diego. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Diego. 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 into for flights to San Diego from London Heathrow?

    San Diego (SAN) is the airport you will fly into if you book a flight from London Heathrow to San Diego. You should not have trouble finding flights to San Diego from London Heathrow; the airport handles an average of 9 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 10 airlines have flights to the San Diego airport from London Heathrow. It is only a 2.6 mi journey from San Diego (SAN) to San Diego’s city center.

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

    United Airlines, Scandinavian Airlines, and British Airways can get you from London Heathrow Airport to San Diego in just under 11h 20m. Your travel time can differ by up to 12h 55m. London Heathrow Airport and San Diego are separated by a distance of 5469 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to San Diego round-trip?

    Flying on JetBlue is currently your cheapest option to San Diego, with prices starting at £426. Additional return tickets that might be worth considering are offered by Lufthansa and Iberia, with the lowest prices starting at £429 and £435, respectively. You may be able to fly from London Heathrow Airport to San Diego for 35% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from London Heathrow Airport to San Diego one-way?

    The cheapest airline one-way is Lufthansa, with whom users have recently found tickets for as low as £306. However, be on the lookout for offers from JetBlue and British Airways, as they are both options that can get you from London Heathrow Airport to San Diego for a low price.

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

    No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to San Diego consider choosing American Airlines (82%), Alaska Airlines (82%) or British Airways (82%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for £588. While the most popular route (London Heathrow - San Diego) can be booked for £535 on average, our data indicates £891 when flying from London Heathrow Airport to San Diego.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to San Diego 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 London Heathrow Airport to San Diego?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of £483). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of £792). 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 San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
El Cajon

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Fly from Heathrow to San Diego on these airlines

Choose from the following airlines for your flight from Heathrow to San Diego. Flights are based on user searches made on Cheapflights and were last updated on 9 June 2026.

Top 10 airlines flying from Heathrow to San Diego

Discover the top 10 airlines that operate flights from Heathrow to San Diego. 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£426Average£693FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£429Average£578FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IberiaCheapest£435Average£578FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£442Average£597FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£457Average£788FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£469Average£651FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£480Average£611FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£490Average£632FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£490Average£738FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£753Average£978FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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 Heathrow to San Diego?

When you search for this flight from Heathrow to San Diego, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

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

Need flexible booking options for your flight to San Diego from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Not ready to book yet? You can track prices for flights from Heathrow to San Diego on Cheapflights with our Price Alert feature and get notified when better prices are available.

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