Cheap flights from San Diego to London Heathrow Airport from £183

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
20 Nov — 27 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Diego to London Heathrow are usually found in February or October, booked 34 days in advance, depart on a Monday or Saturday and return on a Monday

Cheap 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 21 October 2025.

Round-trip from

£431

One-way from

£183

Popular in

June

Cheapest in

February

Average price

£550

Good round-trip deal

£534 or less

Good one-way deal

£386 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 16/2-23/2
  • 4 total stops
  • 45h 05m total
  • San Diego to London
WestJet
  • WestJet
  • 2/2
  • 1 total stop
  • 16h 15m 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 (£26 potential savings vs. average return price).
Average for round-trip flights in October 2025
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.

Find 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 21 October 2025.

Thu 4/1216:04SAN - LHR
2 stops18h 26mScandinavian Airlines
Tue 9/1206:40LHR - SAN
2 stops24h 14mScandinavian Airlines
Deal found 20/10£433
Thu 4/1216:04SAN - LHR
2 stops17h 36mScandinavian Airlines
Thu 11/1206:40LHR - SAN
2 stops22h 25mScandinavian Airlines
Deal found 20/10£434
Mon 27/1012:28SAN - LHR
1 stop13h 07mIberia
Mon 10/1112:35LHR - SAN
1 stop16h 13mIberia
Deal found 19/10£436
Sun 9/1111:35SAN - LHR
1 stop13h 10mVirgin Atlantic
Tue 25/1113:00LHR - SAN
1 stop17h 20mVirgin Atlantic
Deal found 20/10£437
Tue 18/1109:30SAN - LHR
1 stop13h 05mBritish Airways
Tue 25/1112:50LHR - SAN
Nonstop11h 20mBritish Airways
Deal found 19/10£447
Tue 2/1209:59SAN - LHR
2 stops27h 41mScandinavian Airlines
Tue 9/1206:40LHR - SAN
2 stops24h 14mScandinavian Airlines
Deal found 20/10£449
Mon 17/1116:07SAN - LHR
2 stops21h 33mScandinavian Airlines
Thu 20/1107:05LHR - SAN
3 stops23h 50mScandinavian Airlines
Deal found 19/10£451
Tue 4/1118:00SAN - LHR
Nonstop10h 35mBritish Airways
Wed 26/1108:20LHR - SAN
1 stop15h 34mBritish Airways
Deal found 19/10£452
Tue 2/1217:35SAN - LHR
1 stop15h 30mLufthansa
Thu 25/1206:35LHR - SAN
1 stop17h 10mLufthansa
Deal found 19/10£452

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

Fly from

San Diego

Fly to

Heathrow

Route

Depart

Return

Price

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 26/2

07:00-18:30

2 stops27h 30m

London Heathrow

Sat 7/3

06:40-22:55

2 stops24h 15m

£443

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 4/12

16:04-21:20

3 stops21h 16m

London Heathrow

Thu 11/12

06:40-23:58

2 stops25h 18m

£445

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 12/2

10:00-17:40

2 stops23h 40m

London Heathrow

Thu 26/2

07:05-22:55

3 stops23h 50m

£452

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 4/12

16:04-21:20

3 stops21h 16m

London Heathrow

Tue 9/12

06:40-21:05

2 stops22h 25m

£452

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 17/2

10:00-21:40

2 stops27h 40m

London Heathrow

Tue 24/2

07:05-22:55

3 stops23h 50m

£452

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 15/1

10:00-16:00

3 stops22h 00m

London Heathrow

Sat 24/1

06:40-22:55

3 stops24h 15m

£452

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 14/2

10:00-21:40

2 stops27h 40m

London Heathrow

Sat 28/2

06:40-22:55

3 stops24h 15m

£452

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 10/2

10:00-21:35

3 stops27h 35m

London Heathrow

Tue 24/2

07:05-22:55

3 stops23h 50m

£455

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 30/11

18:00-12:35

Nonstop10h 35m

London Heathrow

Thu 11/12

12:50-16:10

Nonstop11h 20m

£466

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 10/2

11:50-08:45

1 stop12h 55m

London Heathrow

Tue 24/2

06:30-12:05

1 stop13h 35m

£470

Flights are sorted by cheapest return flights first.

Deals found on 19/10

Showing 1-10 of 22 results
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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 17 October 2025.

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 £361). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £618). 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 21 October 2025.

It’s optimal to fly from San Diego to London Heathrow Airport in the morning. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the evening.

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

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 21 October 2025.
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.

Crew

7.6

Comfort

6.7

Entertainment

6.4

Overall

6.7

Boarding

6.9

Food

6.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

Crew

7.6

Comfort

6.7

Entertainment

6.4

Overall

6.7

Boarding

6.9

Food

6.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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 8 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 27h 30m. Fly via Scandinavian Airlines to get the fastest option. Airlines will cover a distance of 5469 mi.

  • 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 £511 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 (79%), Alaska Airlines (79%) or British Airways (79%) 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 £527, our data shows the cheapest flight currently is £310. When looking at the most popular route, (San Diego - London Heathrow), you can expect to pay £402 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 £361). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £618). 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
Slough
Gatwick
Hounslow
Northampton
Luton
Wembley
Ilford
Deal
Hayes
Colchester
Watford
Crawley
Winchester
Swindon
Chichester
Romford
Ipswich
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 21 October 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£511Average£750FlexibilityNo 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?

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

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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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