Cheap flights from London Heathrow Airport to San Diego from £319

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
14 May — 21 May1
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 32 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 14 April 2026.

Thu 12/1107:25
LHR
-
SAN
1 stop20h 55m
JetBlue
Sun 6/1221:05
SAN
-
LHR
1 stop15h 40m
JetBlue
Deal found 11/4£582
Tue 12/506:55
LHR
-
SAN
1 stop16h 30m
Lufthansa
Tue 19/516:26
SAN
-
LHR
1 stop13h 44m
Lufthansa
Deal found 14/4£584
Mon 11/507:25
LHR
-
SAN
1 stop16h 00m
Lufthansa
Tue 19/516:26
SAN
-
LHR
1 stop13h 44m
Lufthansa
Deal found 11/4£584
Wed 15/414:30
LHR
-
SAN
Nonstop11h 20m
British Airways
Thu 14/519:40
SAN
-
LHR
Nonstop10h 40m
British Airways
Deal found 11/4£585
Fri 19/613:05
LHR
-
SAN
1 stop14h 46m
United Airlines
Thu 25/610:55
SAN
-
LHR
1 stop17h 30m
United Airlines
Deal found 10/4£605
Tue 15/906:30
LHR
-
SAN
2 stops21h 59m
Multiple Airlines
Tue 29/912:45
SAN
-
LHR
1 stop12h 55m
Multiple Airlines
Deal found 10/4£607
Mon 11/508:40
LHR
-
SAN
2 stops19h 58m
Multiple Airlines
Tue 19/510:55
SAN
-
LHR
1 stop15h 15m
Multiple Airlines
Deal found 11/4£608
Fri 1/511:55
LHR
-
SAN
1 stop16h 09m
JetBlue
Wed 13/521:10
SAN
-
LHR
1 stop15h 35m
JetBlue
Deal found 9/4£608
Tue 1/907:25
LHR
-
SAN
1 stop16h 00m
Multiple Airlines
Tue 15/907:00
SAN
-
LHR
1 stop15h 30m
Multiple Airlines
Deal found 10/4£612
Tue 8/914:30
LHR
-
SAN
Nonstop11h 20m
British Airways
Tue 22/911:09
SAN
-
LHR
1 stop13h 56m
British Airways
Deal found 13/4£613
Thu 14/507:25
LHR
-
SAN
1 stop16h 00m
Lufthansa
Tue 19/516:26
SAN
-
LHR
1 stop13h 44m
Lufthansa
Deal found 10/4£614

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 14 April 2026.

Round-trip from

£584

One-way from

£319

Popular in

July

Cheapest in

February

Average price

£687

Good round-trip deal

£662 or less

Good one-way deal

£566 or less
Lufthansa
  • Lufthansa
  • 12/5-19/5
  • 2 total stops
  • 30h 14m total
  • London to San Diego
United Airlines
  • United Airlines
  • 14/9
  • 1 total stop
  • 15h 46m total
  • London to San Diego
Highest demand for flights based on searches. 9% potential increase in price (£47 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in April 2026
Price to beat on a round-trip flight from London Heathrow to San Diego.
Price to beat on a one-way 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 14 April 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

Wed 2/9

11:35-14:55

Nonstop11h 20m

San Diego

Tue 15/9

08:00-06:20

1 stop14h 20m

£650

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 1/9

11:35-14:55

Nonstop11h 20m

San Diego

Tue 15/9

11:48-09:25

1 stop13h 37m

£658

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 16/9

14:30-17:50

Nonstop11h 20m

San Diego

Sun 20/9

11:09-09:05

1 stop13h 56m

£680

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 11/5

06:30-15:56

2 stops17h 26m

San Diego

Mon 25/5

06:15-07:10

2 stops16h 55m

£690

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 15/5

07:25-18:33

2 stops19h 08m

San Diego

Wed 3/6

21:45-21:20

2 stops15h 35m

£692

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 25/4

21:25-22:25

2 stops33h 00m

San Diego

Wed 29/4

14:23-20:20

2 stops21h 57m

£736

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sun 3/5

07:25-15:25

1 stop16h 00m

San Diego

Sat 9/5

10:55-11:55

2 stops17h 00m

£737
Fastest return journey

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 1/5

11:35-14:55

Nonstop11h 20m

San Diego

Tue 4/8

19:40-14:20

Nonstop10h 40m

£802

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 1/9

06:40-23:43

3 stops25h 03m

San Diego

Thu 17/9

10:00-17:40

2 stops23h 40m

£822

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 30/5

06:40-23:42

3 stops25h 02m

San Diego

Tue 2/6

11:00-21:40

2 stops26h 40m

£828

Flights are sorted by cheapest return flights first.

Deals found on 11/4

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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?

Use this chart to determine the optimal time to book a return flight from Heathrow to San Diego. Price data was last updated on 10 April 2026.

The best time to book flights from London Heathrow Airport to San Diego is 32 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of £338). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of £413). 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 14 April 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 14 April 2026.
Read reviews from past customers who have flown with Virgin Atlantic,United Airlines, andAmerican Airlines 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

Comfort

7.3

Boarding

7.7

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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 4 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?

    British Airways and Delta can get you from London Heathrow Airport to San Diego in just under 11h 20m. Your travel time can differ by up to 6h 06m. 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 £422. Additional return tickets that might be worth considering are offered by Lufthansa and United Airlines, with the lowest prices starting at £426 and £438, respectively. You may be able to fly from London Heathrow Airport to San Diego for 32% 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 £304. However, be on the lookout for offers from JetBlue and Iberia, 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 (80%), Alaska Airlines (80%) or Aer Lingus (80%) 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 £389. While the most popular route (London Heathrow - San Diego) can be booked for £585 on average, our data indicates £2,091 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of £338). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of £413). 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 14 April 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 14 April 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£422Average£712FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£426Average£537FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£438Average£591FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£453Average£613FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£454Average£781FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£474Average£545FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IberiaCheapest£475Average£590FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£480Average£625FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£486Average£714FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£718Average£1,259FlexibilityNo 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?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to San Diego.

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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