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Cheap flights from San Diego to London Heathrow Airport from £166

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 28/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
15 Feb — 22 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

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 16 January 2026.

Round-trip from

£472

One-way from

£166

Popular in

June

Cheapest in

October

Average price

£583

Good round-trip deal

£583 or less

Good one-way deal

£376 or less
Air Canada
  • Air Canada
  • 29/4-8/5
  • 3 total stops
  • 36h 38m total
  • San Diego to London
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WestJet
  • WestJet
  • 28/1
  • 1 total stop
  • 16h 15m total
  • San Diego to London
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£174 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from San Diego to London Heathrow.
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Price to beat on a one-way flight from San Diego to London Heathrow.
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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 16 January 2026.

Wed 29/412:45
SAN
-
LHR
1 stop16h 35m
Air Canada
Fri 8/508:40
LHR
-
SAN
2 stops20h 03m
Air Canada
Deal found 14/1£472
Sun 8/206:30
SAN
-
LHR
2 stops17h 35m
Delta
Tue 24/206:30
LHR
-
SAN
1 stop13h 35m
Delta
Deal found 14/1£474
Tue 3/216:00
SAN
-
LHR
1 stop13h 15m
British Airways
Tue 10/212:50
LHR
-
SAN
Nonstop11h 20m
British Airways
Deal found 15/1£474
Wed 9/908:10
SAN
-
LHR
1 stop14h 20m
Air Canada
Wed 16/908:40
LHR
-
SAN
2 stops19h 03m
Air Canada
Deal found 14/1£475
Tue 28/418:22
SAN
-
LHR
2 stops17h 18m
Lufthansa
Thu 14/515:00
LHR
-
SAN
1 stop13h 50m
Lufthansa
Deal found 14/1£476
Sat 31/118:00
SAN
-
LHR
2 stops18h 35m
United Airlines
Thu 12/211:35
LHR
-
SAN
1 stop19h 00m
United Airlines
Deal found 15/1£477
Wed 21/107:45
SAN
-
LHR
2 stops20h 05m
Air Canada
Thu 29/113:25
LHR
-
SAN
2 stops17h 12m
Air Canada
Deal found 13/1£477
Thu 5/221:00
SAN
-
LHR
1 stop15h 45m
JetBlue
Mon 23/208:05
LHR
-
SAN
1 stop19h 55m
JetBlue
Deal found 15/1£478
Tue 28/414:16
SAN
-
LHR
1 stop13h 54m
British Airways
Tue 5/511:35
LHR
-
SAN
Nonstop11h 20m
British Airways
Deal found 14/1£479
Wed 28/106:15
SAN
-
LHR
2 stops18h 30m
Delta
Wed 11/211:30
LHR
-
SAN
2 stops19h 17m
Delta
Deal found 14/1£480
Wed 2/913:08
SAN
-
LHR
1 stop14h 07m
British Airways
Wed 16/914:30
LHR
-
SAN
Nonstop11h 20m
British Airways
Deal found 16/1£480
Mon 23/322:25
SAN
-
LHR
1 stop14h 45m
Delta
Thu 2/406:30
LHR
-
SAN
1 stop13h 20m
Delta
Deal found 15/1£481

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 16 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

Thu 26/2

21:10-20:45

1 stop15h 35m

London Heathrow

Sat 7/3

08:05-20:23

1 stop20h 18m

£474

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 4/2

06:20-08:15

1 stop17h 55m

London Heathrow

Tue 10/2

12:50-16:10

Nonstop11h 20m

£474

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 8/2

09:24-07:50

1 stop14h 26m

London Heathrow

Mon 16/2

19:40-22:30

2 stops34h 50m

£474

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 5/5

06:32-07:15

2 stops16h 43m

London Heathrow

Wed 13/5

07:25-15:25

1 stop16h 00m

£477

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 22/3

07:30-10:30

1 stop20h 00m

London Heathrow

Tue 31/3

06:30-18:22

2 stops19h 52m

£477

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 11/3

10:00-10:15

2 stops17h 15m

London Heathrow

Tue 17/3

06:20-18:22

2 stops19h 02m

£480

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 11/2

06:35-08:05

2 stops17h 30m

London Heathrow

Fri 20/2

06:30-17:50

2 stops19h 20m

£480

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 7/3

14:46-06:50

1 stop32h 04m

London Heathrow

Tue 17/3

12:50-17:10

Nonstop11h 20m

£482

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 11/3

12:40-09:30

1 stop13h 50m

London Heathrow

Wed 18/3

12:20-09:34

1 stop28h 14m

£482

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 2/4

20:39-10:10

1 stop29h 31m

London Heathrow

Fri 10/4

15:05-12:00

1 stop28h 55m

£514

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 23 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 9 January 2026.

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 £350). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £666). 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 16 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 16 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
7,680 reviews
Check prices

Entertainment

6.4

Food

6.4

Comfort

6.8

Boarding

6.9

Overall

6.7

Crew

7.6

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
7,680 reviews
British Airways
6.7
Okay
7,680 reviews
Check prices

Entertainment

6.4

Food

6.4

Comfort

6.8

Boarding

6.9

Overall

6.7

Crew

7.6

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 4 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 15h 35m. Fly via JetBlue, British Airways, or United Airlines 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 £509 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 (67%), Alaska Airlines (67%) or Aer Lingus (67%) 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 £515, our data shows the cheapest flight currently is £187. When looking at the most popular route, (San Diego - London Heathrow), you can expect to pay £417 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 £350). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of £666). 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
Northampton
Slough
Gatwick
Hounslow
Wembley
Ilford
Brentford
Hayes
Colchester
Watford
Crawley
Kingston upon Thames
Swindon
Bedford
Chelmsford
Eastbourne
Romford

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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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£509Average£697FlexibilityNo 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?

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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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