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$590+ Cheap flights from Heathrow (LHR) to San Diego (SAN)

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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to San Diego are usually found in February or January, booked 81 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Heathrow to San Diego

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 July 28, 2026.

This TravelUp deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:40 am
LHR
-
SAN
2 stops24h 20m
Scandinavian Airlines
Wed 9/97:30 am
SAN
-
LHR
2 stops24h 30m
Scandinavian Airlines
Deal found 7/23$798
This Expedia deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:25 am
LHR
-
SAN
1 stop16h 00m
Multiple Airlines
Wed 9/168:00 am
SAN
-
LHR
1 stop14h 55m
Multiple Airlines
Deal found 7/26$800
This Expedia deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:25 am
LHR
-
SAN
1 stop16h 00m
Multiple Airlines
Mon 9/2110:40 am
SAN
-
LHR
1 stop13h 50m
Multiple Airlines
Deal found 7/25$801
This Gotogate deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:55 am
LHR
-
SAN
1 stop16h 30m
Lufthansa
Mon 9/145:15 pm
SAN
-
LHR
1 stop15h 50m
Lufthansa
Deal found 7/24$802
This Gotogate deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:55 am
LHR
-
SAN
1 stop16h 30m
Lufthansa
Mon 9/285:15 pm
SAN
-
LHR
1 stop14h 25m
Lufthansa
Deal found 7/25$803
This Cheapflightsfares deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:25 am
LHR
-
SAN
1 stop16h 00m
Lufthansa
Wed 10/213:56 pm
SAN
-
LHR
1 stop14h 14m
Lufthansa
Deal found 7/26$805
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:00 am
LHR
-
SAN
2 stops18h 35m
United Airlines
Mon 8/1710:40 pm
SAN
-
LHR
1 stop24h 05m
United Airlines
Deal found 7/27$806
This Cheapflightsfares deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:25 am
LHR
-
SAN
1 stop16h 00m
Lufthansa
Tue 9/155:15 pm
SAN
-
LHR
1 stop15h 50m
Lufthansa
Deal found 7/23$807
This Bravofly deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:00 am
LHR
-
SAN
2 stops22h 45m
SWISS
Mon 9/141:24 pm
SAN
-
LHR
2 stops20h 26m
SWISS
Deal found 7/24$810
This Globehunters deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1511:10 am
LHR
-
SAN
1 stop36h 35m
Lufthansa
Mon 12/77:00 am
SAN
-
LHR
1 stop16h 55m
Lufthansa
Deal found 7/24$811

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 July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$795
(Kiwi.com)

One-way from

$590
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$1,119

Good round-trip deal

$953 or less

Good one-way deal

$616 or less
Provider with most accurate pricing for London Heathrow-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-San Diego flights.
Search Deals
From London Heathrow to San Diego
Search Deals
One-way flight from London Heathrow to San Diego
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to San Diego.
Search Deals
Price to beat on a one-way flight from London Heathrow to San Diego.
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 28, 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 round-trip

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 9/15

7:25 am-3:25 pm

1 stop16h 00m

San Diego

Thu 10/15

6:15 am-7:25 am

2 stops17h 10m

$823

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 9/8

6:55 am-3:25 pm

1 stop16h 30m

San Diego

Tue 9/15

11:19 am-12:25 pm

2 stops17h 06m

$823

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 9/7

7:25 am-3:25 pm

1 stop16h 00m

San Diego

Mon 9/14

6:15 am-5:55 am

2 stops15h 40m

$825

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sun 11/22

4:40 pm-3:45 pm

1 stop31h 05m

San Diego

Thu 12/3

11:00 am-9:40 am

2 stops14h 40m

$835

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 9/8

11:35 am-2:55 pm

Nonstop11h 20m

San Diego

Tue 9/15

1:10 pm-11:15 am

1 stop14h 05m

$859
Quickest round-trip

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 9/5

11:35 am-2:55 pm

Nonstop11h 20m

San Diego

Mon 9/21

7:40 pm-2:20 pm

Nonstop10h 40m

$897

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 9/5

11:45 am-8:48 pm

2 stops17h 03m

San Diego

Mon 9/21

6:15 am-6:25 am

2 stops16h 10m

$906

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 11/20

7:05 am-10:57 pm

3 stops23h 52m

San Diego

Fri 11/27

3:00 pm-6:30 pm

2 stops19h 30m

$915

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 10/10

6:55 am-3:25 pm

1 stop16h 30m

San Diego

Mon 10/19

9:45 am-10:10 am

2 stops16h 25m

$918

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 11/21

10:20 am-10:55 pm

2 stops20h 35m

San Diego

Fri 11/27

10:00 am-6:30 pm

2 stops24h 30m

$923

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Heathrow to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to San Diego in July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
BusinessClassPrice Accuracy-Trust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London Heathrow Airport to San Diego?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $677). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of $1,119). 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 July 28, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to San Diego as you normally would.

How much does it cost to fly round-trip from London Heathrow Airport to San Diego?

Airfare is below average for this route at the moment.

London Heathrow Airport to San Diego flights typically cost between $806 and $1,428 in September.
The cheapest round-trip price found within the last 5 days was $798 on Scandinavian Airlines (Sep 5-Sep 9).

The best insider tips for London Heathrow Airport to San Diego flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to San Diego trip
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 July 28, 2026.
See what other customers who have flown with United Airlines,American Airlines, andBritish Airways from London Heathrow Airport to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,046 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Tim,Sep 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
United Airlines
7.4
Good
10,046 reviews
United Airlines
7.4
Good
10,046 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Tim,Sep 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
American Airlines
7.1
Good
11,841 reviews
United Airlines
7.4
Good
10,046 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Tim,Sep 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
British Airways
6.7
Okay
8,128 reviews
United Airlines
7.4
Good
10,046 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Tim,Sep 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

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?

    Located just 2.6 mi from the city center, San Diego is the airport most travelers will use when flying to San Diego from London Heathrow. Booking flights from London Heathrow to San Diego (SAN) should be relatively easy as there are 9 daily inbound flights from London Heathrow from 3 different airlines.

  • How long is the flight from London Heathrow Airport to San Diego?

    A quick flight from London Heathrow Airport to San Diego can take about 11h 20m. United Airlines provides one of the quickest options available for as low as $859. London Heathrow Airport and San Diego are separated by a distance of 5469 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from London Heathrow Airport to San Diego is United Airlines. Our recent data shows that you can find tickets from as low as $605 on this airline. Additional options worth looking into are British Airways and American Airlines, starting at $658 and $697 round-trip. United Airlines is currently priced 33% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to San Diego one-way?

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as $436. However, be on the lookout for offers from Iberia and Finnair, 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?

    The top 3 most reliable airlines when flying from London Heathrow Airport to San Diego are American Airlines (82%), Alaska Airlines (82%) and British Airways (82%).

  • What are the cheapest flights from London Heathrow Airport to San Diego?

    Looking for the cheapest flight from London Heathrow Airport to San Diego? While on average our users pay $1,872, our data indicates the cheapest price to be $556. The most popular route (London Heathrow - San Diego), is priced around $579.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $677). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of $1,119). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
National City
Chula Vista
Poway
La Mesa
Coronado
Santee
San Ysidro
Julian
Lemon Grove

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Heathrow to San Diego

Discover the top 3 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 2,558,603 searches. Data last updated July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$605Average$813FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$658Average$920FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$697Average$1,312FlexibilityNo cancel feeOn-time71%

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