Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from San Diego to London Heathrow Airport from £313

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 28/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
1 Feb — 8 Feb1
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 Saturday and return on a Tuesday

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 2 January 2026.

Wed 31/1214:31SAN - LHR
1 stop13h 49mBritish Airways
Wed 7/108:20LHR - SAN
1 stop18h 52mBritish Airways
Deal found 30/12£7,214
Wed 31/1211:12SAN - LHR
2 stops21h 53mLufthansa
Wed 7/107:40LHR - SAN
2 stops23h 25mLufthansa
Deal found 30/12£12,254
Wed 31/1218:00SAN - LHR
Nonstop10h 35mAlaska Airlines
Wed 7/112:50LHR - SAN
Nonstop11h 20mAlaska Airlines
Deal found 30/12£17,650
Wed 31/1216:00SAN - LHR
2 stops19h 15mMultiple Airlines
Wed 7/111:45LHR - SAN
1 stop14h 51mMultiple Airlines
Deal found 30/12£20,264

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 2 January 2026.

Round-trip from

£468

One-way from

£313

Popular in

June

Cheapest in

October

Average price

£556

Good round-trip deal

£638 or less
JetBlue
  • JetBlue
  • 29/1-7/2
  • 2 total stops
  • 34h 55m total
  • San Diego to London
Search Deals
28/3
  • 28/3
  • 2 total stops
  • 53h 21m total
  • San Diego to London
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£175 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from San Diego to London Heathrow.
Search Deals

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 2 January 2026.
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

Fri 30/1

21:00-22:00

1 stop17h 00m

London Heathrow

Sun 8/2

07:45-19:49

1 stop20h 04m

£475

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 22/1

15:30-20:45

1 stop21h 15m

London Heathrow

Sun 25/1

07:45-19:50

1 stop20h 05m

£476

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 18/2

21:10-21:40

1 stop16h 30m

London Heathrow

Mon 23/2

08:05-20:00

1 stop19h 55m

£476

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 5/5

15:35-15:35

1 stop16h 00m

London Heathrow

Wed 13/5

06:30-15:19

2 stops16h 49m

£509

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 28/4

06:20-07:55

2 stops17h 35m

London Heathrow

Tue 5/5

06:00-18:41

2 stops20h 41m

£516

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 26/2

10:40-17:40

2 stops23h 00m

London Heathrow

Sat 7/3

06:40-21:05

2 stops22h 25m

£519

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Fri 27/2

10:40-10:55

1 stop16h 15m

London Heathrow

Mon 2/3

20:25-12:05

1 stop23h 40m

£528

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 4/3

15:20-21:35

3 stops22h 15m

London Heathrow

Wed 11/3

10:20-23:14

2 stops19h 54m

£528

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 10/2

14:55-21:35

3 stops22h 40m

London Heathrow

Tue 24/2

06:40-21:05

2 stops22h 25m

£528

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 2/3

10:40-18:30

3 stops23h 50m

London Heathrow

Mon 16/3

06:40-23:14

3 stops23h 34m

£529

Flights are sorted by cheapest return flights first.

Deals found on 31/12

Showing 1-10 of 20 results
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 26 December 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 £348). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £616). 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 2 January 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 2 January 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.
British Airways
6.7
Okay
7,635 reviews
Check prices

Entertainment

6.4

Crew

7.6

Boarding

6.9

Overall

6.7

Comfort

6.7

Food

6.4

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,635 reviews
British Airways
6.7
Okay
7,635 reviews
Check prices

Entertainment

6.4

Crew

7.6

Boarding

6.9

Overall

6.7

Comfort

6.7

Food

6.4

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely 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 6 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 16h. Fly via JetBlue, Delta, or SWISS 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 £507 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 (74%), Alaska Airlines (74%) or British Airways (74%) 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 £638, our data shows the cheapest flight currently is £594. When looking at the most popular route, (San Diego - London Heathrow), you can expect to pay £462 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 £348). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £616). 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
Luton
Slough
Northampton
Hounslow
Gatwick
Ilford
Wembley
Hayes
Brentford
Colchester
Watford
Crawley
Swindon
Bedford
Chelmsford
Romford
Eastbourne
Ipswich

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Diego to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to Gatwick flights
Los Angeles to London City flights
Los Angeles to Stansted flights
San Francisco to Gatwick flights
Ontario to Heathrow flights
San Francisco to London City flights
San Francisco to Stansted flights
Los Angeles to Luton flights
Las Vegas to Heathrow flights
San Francisco to Luton flights
San Diego to Gatwick flights
Santa Ana to Heathrow flights
San Jose to Heathrow flights
Sacramento to Heathrow flights
Las Vegas to Gatwick flights
Las Vegas to London City flights
San Diego to Stansted flights
Sacramento to Gatwick flights
Oakland to Heathrow flights
Burbank to Heathrow flights
Ontario to Gatwick flights
San Jose to Gatwick flights
Santa Ana to Gatwick flights
Oakland to Gatwick flights
Reno to Heathrow flights
Burbank to Gatwick flights
Palm Springs to Heathrow flights
Reno to Gatwick flights
Las Vegas to Luton flights
Fresno to Gatwick flights
Medford to Heathrow flights
San Jose to Stansted flights
Santa Barbara to Heathrow flights

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 2 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£507Average£699FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.