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Cheap flights from London Heathrow Airport to San Diego from £412

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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London Heathrow to San Diego are usually found in January or February, booked 89 days in advance, depart on a Tuesday or Monday and return on a Monday

Cheap 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 7 November 2025.

Round-trip from

£495

One-way from

£412

Popular in

July

Cheapest in

January

Average price

£529

Good round-trip deal

£556 or less

Good one-way deal

£476 or less
British Airways
  • British Airways
  • 2/3-9/3
  • Nonstop
  • 21h 55m total
  • London to San Diego
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6/12
  • 6/12
  • 3 total stops
  • 52h 18m total
  • London to San Diego
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£79 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to San Diego.
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Price to beat on a one-way flight from London Heathrow to San Diego.
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Find 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 7 November 2025.

Wed 3/1211:55LHR - SAN
1 stop16h 21mBritish Airways
Tue 9/1218:00SAN - LHR
Nonstop10h 35mBritish Airways
Deal found 5/11£496
Wed 3/1206:00LHR - SAN
2 stops22h 48mMultiple Airlines
Tue 9/1212:40SAN - LHR
1 stop33h 50mMultiple Airlines
Deal found 5/11£510
Tue 9/1212:50LHR - SAN
Nonstop11h 20mBritish Airways
Tue 23/1210:42SAN - LHR
1 stop15h 18mBritish Airways
Deal found 5/11£512
Wed 3/1209:30LHR - SAN
2 stops19h 15mUnited Airlines
Tue 9/1211:02SAN - LHR
2 stops14h 38mUnited Airlines
Deal found 5/11£516
Thu 4/1206:00LHR - SAN
2 stops22h 33mAustrian Airlines
Thu 11/1207:42SAN - LHR
1 stop19h 08mAustrian Airlines
Deal found 6/11£519
Thu 4/1207:40LHR - SAN
1 stop16h 05mLufthansa
Mon 8/1214:16SAN - LHR
1 stop12h 59mLufthansa
Deal found 6/11£523
Thu 4/1216:30LHR - SAN
1 stop15h 23mBritish Airways
Thu 11/1218:00SAN - LHR
Nonstop10h 35mBritish Airways
Deal found 6/11£525
Thu 4/1207:40LHR - SAN
1 stop16h 05mMultiple Airlines
Thu 11/1212:40SAN - LHR
1 stop14h 40mMultiple Airlines
Deal found 6/11£537
Thu 4/1206:35LHR - SAN
1 stop17h 10mUnited Airlines
Mon 8/1220:40SAN - LHR
2 stops15h 55mUnited Airlines
Deal found 6/11£538
Thu 11/1206:35LHR - SAN
1 stop17h 10mUnited Airlines
Mon 15/1212:50SAN - LHR
1 stop12h 50mUnited Airlines
Deal found 5/11£538
Wed 3/1207:40LHR - SAN
1 stop15h 50mUnited Airlines
Mon 8/1208:01SAN - LHR
1 stop18h 14mUnited Airlines
Deal found 5/11£539
Mon 24/1119:15LHR - SAN
1 stop28h 30mLufthansa
Tue 9/1207:00SAN - LHR
1 stop16h 55mLufthansa
Deal found 6/11£540

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 7 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Diego that are best for you.

Fly from

Heathrow

Fly to

San Diego

Route

Depart

Return

Price

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 11/2

07:30-17:28

2 stops17h 58m

San Diego

Wed 18/2

10:30-07:30

1 stop13h 00m

£521

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 21/4

07:30-17:19

2 stops17h 49m

San Diego

Mon 27/4

10:50-11:10

2 stops16h 20m

£535

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 4/12

06:35-15:45

1 stop17h 10m

San Diego

Mon 8/12

20:40-20:35

2 stops15h 55m

£538

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 4/12

08:30-22:30

2 stops22h 00m

San Diego

Thu 11/12

09:54-13:30

2 stops19h 36m

£544

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 19/2

16:40-15:45

1 stop31h 05m

San Diego

Thu 5/3

09:00-09:40

1 stop16h 40m

£545

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 20/2

06:35-15:45

1 stop17h 10m

San Diego

Tue 24/2

12:16-10:15

1 stop13h 59m

£548

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 13/2

07:30-17:40

2 stops18h 10m

San Diego

Mon 16/2

11:05-12:00

2 stops16h 55m

£550

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 15/1

12:50-16:10

Nonstop11h 20m

San Diego

Sat 24/1

18:00-12:35

Nonstop10h 35m

£554

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 18/3

06:35-16:45

1 stop17h 10m

San Diego

Wed 15/4

16:10-12:20

1 stop12h 10m

£556

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 18/4

06:30-21:11

2 stops22h 41m

San Diego

Mon 27/4

10:45-11:10

2 stops16h 25m

£563

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 20 results
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?

Use this chart to determine the optimal time to book a return flight from Heathrow to San Diego. Price data was last updated on 31 October 2025.

The best time to book flights from London Heathrow Airport to San Diego is 89 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 £348). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of £425). 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 7 November 2025.

When flying from London Heathrow Airport to San Diego, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 9% versus a flight in the afternoon.

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 7 November 2025.
Read reviews from past customers who have flown with Virgin Atlantic, United Airlines, andIberia 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.
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

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!
Virgin Atlantic
7.5
Good
672 reviews
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

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!
United Airlines
7.4
Good
9,007 reviews
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

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!
Iberia
7.0
Good
3,007 reviews
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

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!
Lufthansa
6.8
Okay
7,558 reviews
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

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!
British Airways
6.7
Okay
7,500 reviews
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

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 5 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 12 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 can get you from London Heathrow Airport to San Diego in just under 17h 58m. Your travel time can differ by up to . London Heathrow Airport and San Diego are separated by a distance of 5469 mi.

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

    Flying on Air Canada is currently your cheapest option to San Diego, with prices starting at £396. Additional return tickets that might be worth considering are offered by Virgin Atlantic and British Airways, with the lowest prices starting at £410 and £421, 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 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 (68%), Alaska Airlines (68%) or British Airways (68%) 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 £400. While the most popular route (London Heathrow - San Diego) can be booked for £495 on average, our data indicates £2,039 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 £348). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of £425). 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 7 November 2025.
British Airways flights from London Heathrow to San Diego
Virgin Atlantic flights from London Heathrow to San Diego
Finnair flights from London Heathrow to San Diego

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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£396Average£503FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£410Average£531FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£421Average£578FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£421Average£506FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£426Average£436FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£430Average£563FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£431Average£573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£436Average£572FlexibilityNo cancel feeOn-time75%
Search KLM flights
JetBlueCheapest£466Average£841FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IberiaCheapest£488Average£621FlexibilityNo cancel feeOn-time77%
Search Iberia 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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