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$423+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
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 57 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 March 11, 2026.

This United Airlines deal was found by Cheapflights users on 3/8. 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.
Thu 9/102:10 pm
LHR
-
SAN
2 stops38h 35m
United Airlines
Sat 9/125:00 pm
SAN
-
LHR
1 stop33h 10m
United Airlines
Deal found 3/8$611
This Ticket deal was found by Cheapflights users on 3/8. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:10 pm
LHR
-
SAN
1 stop28h 15m
Lufthansa
Mon 5/45:15 pm
SAN
-
LHR
1 stop14h 25m
Lufthansa
Deal found 3/8$702
This TravelUp deal was found by Cheapflights users on 3/10. 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.
Wed 9/306:55 am
LHR
-
SAN
1 stop16h 30m
Lufthansa
Wed 10/712:45 pm
SAN
-
LHR
1 stop12h 55m
Lufthansa
Deal found 3/10$709
This TravelUp deal was found by Cheapflights users on 3/7. 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.
Tue 4/217:25 am
LHR
-
SAN
1 stop16h 00m
Lufthansa
Tue 4/2812:40 pm
SAN
-
LHR
1 stop13h 00m
Lufthansa
Deal found 3/7$710
This TravelUp deal was found by Cheapflights users on 3/9. 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.
Wed 4/226:55 am
LHR
-
SAN
1 stop16h 30m
Multiple Airlines
Wed 4/298:00 am
SAN
-
LHR
1 stop14h 55m
Multiple Airlines
Deal found 3/9$712
This Mytrip deal was found by Cheapflights users on 3/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:25 pm
LHR
-
SAN
1 stop27h 00m
Lufthansa
Mon 4/275:15 pm
SAN
-
LHR
1 stop17h 10m
Lufthansa
Deal found 3/6$714
This TravelUp deal was found by Cheapflights users on 3/6. 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.
Mon 4/135:50 pm
LHR
-
SAN
1 stop29h 35m
Lufthansa
Mon 4/202:10 pm
SAN
-
LHR
1 stop13h 45m
Lufthansa
Deal found 3/6$719
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:25 am
LHR
-
SAN
1 stop16h 00m
Lufthansa
Wed 4/2912:40 pm
SAN
-
LHR
1 stop13h 00m
Lufthansa
Deal found 3/8$723
This Mytrip deal was found by Cheapflights users on 3/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:25 pm
LHR
-
SAN
1 stop27h 00m
Lufthansa
Mon 5/45:15 pm
SAN
-
LHR
1 stop17h 10m
Lufthansa
Deal found 3/9$724
This The Travel House deal was found by Cheapflights users on 3/9. 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 The Travel House 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
Lufthansa
Sat 9/126:28 pm
SAN
-
LHR
1 stop28h 57m
Lufthansa
Deal found 3/9$734
This TravelUp deal was found by Cheapflights users on 3/7. 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.
Tue 4/212:30 pm
LHR
-
SAN
Nonstop11h 20m
British Airways
Tue 4/289:05 am
SAN
-
LHR
1 stop13h 45m
British Airways
Deal found 3/7$741

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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$702
(Ticket)

One-way from

$423
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$810

Good round-trip deal

$1,030 or less

Good one-way deal

$610 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. 12% potential increase in price ($112 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 11, 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

Mon 4/20

7:30 am-6:38 pm

2 stops19h 08m

San Diego

Mon 4/27

4:21 pm-2:10 pm

1 stop13h 49m

$752

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 5/2

7:25 am-3:25 pm

1 stop16h 00m

San Diego

Thu 5/7

10:55 am-10:10 am

1 stop15h 15m

$786

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 4/23

7:25 am-3:25 pm

1 stop16h 00m

San Diego

Thu 4/30

11:00 am-9:40 am

1 stop14h 40m

$788

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 9/7

8:40 am-6:54 pm

2 stops18h 14m

San Diego

Thu 9/17

3:59 pm-5:35 pm

1 stop17h 36m

$789

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 4/20

6:30 am-3:55 pm

2 stops17h 25m

San Diego

Mon 5/4

6:25 am-7:10 am

2 stops16h 45m

$791

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 9/4

7:05 am-8:48 pm

2 stops21h 43m

San Diego

Fri 9/25

7:00 am-6:30 pm

3 stops27h 30m

$828

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 5/2

6:55 am-3:25 pm

1 stop16h 30m

San Diego

Sat 5/16

6:20 am-7:25 am

2 stops17h 05m

$829
Quickest round-trip

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 4/20

11:35 am-2:55 pm

Nonstop11h 20m

San Diego

Mon 5/4

7:40 pm-2:20 pm

Nonstop10h 40m

$850

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 8/28

7:05 am-10:48 pm

3 stops23h 43m

San Diego

Sat 9/5

10:00 am-6:30 pm

2 stops24h 30m

$882

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 6/12

3:05 pm-8:50 pm

1 stop13h 45m

San Diego

Wed 7/8

4:09 pm-2:10 pm

1 stop14h 01m

$931

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 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?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to San Diego. Price data was last updated on March 6, 2026.

Booking 57 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $444). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of $556). 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 March 11, 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?

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 March 11, 2026.
See what other customers who have flown with United Airlines,American Airlines, andIberia 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
9,410 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
9,410 reviews
United Airlines
7.4
Good
9,410 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
11,415 reviews
United Airlines
7.4
Good
9,410 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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.
Iberia
7.0
Good
3,133 reviews
United Airlines
7.4
Good
9,410 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
7,781 reviews
United Airlines
7.4
Good
9,410 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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 5 daily inbound flights from London Heathrow from 4 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 16h. United Airlines provides one of the quickest options available for as low as $745. 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 Iberia. Our recent data shows that you can find tickets from as low as $599 on this airline. Additional options worth looking into are United Airlines and British Airways, starting at $637 and $640 round-trip. Iberia is currently priced 26% 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 American Airlines, with whom users have recently found tickets for as low as $545. However, be on the lookout for offers from Lufthansa and Iberia, 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 (70%), Alaska Airlines (70%) and Aer Lingus (70%).

  • 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 $1,355, our data indicates the cheapest price to be $576. The most popular route (London Heathrow - San Diego), is priced around $712.

  • 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $444). Flying from London Heathrow Airport to San Diego in July is currently the most expensive (average of $556). 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
Chula Vista
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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Top 4 airlines flying from Heathrow to San Diego

Discover the top 4 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 March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$599Average$942FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$637Average$748FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$640Average$847FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$664Average$850FlexibilityNo cancel feeOn-time71%

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