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$574+ 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
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to San Diego are usually found in January or February, booked 85 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap 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 September 11, 2025.

Round-trip from

$633
(Air Canada)

One-way from

$574
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$674

Good round-trip deal

$767 or less

Good one-way deal

$822 or less
From London Heathrow to San Diego
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One-way flight from London Heathrow to San Diego
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Highest demand for flights based on searches. 16% potential increase in price ($149 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from London Heathrow to San Diego.
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Price to beat on a one-way flight from London Heathrow to San Diego.
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Find 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 September 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/189:30 amLHR - SAN
2 stops22h 45mAir Canada
Mon 9/296:53 amSAN - LHR
2 stops15h 42mAir Canada
Deal found 9/11$633
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/231:25 pmLHR - SAN
2 stops18h 48mAir Canada
Wed 12/312:25 pmSAN - LHR
1 stop14h 55mAir Canada
Deal found 9/10$634
This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:30 amLHR - SAN
2 stops19h 05mAir Canada
Sun 10/58:10 amSAN - LHR
2 stops19h 40mAir Canada
Deal found 9/11$635
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:30 amLHR - SAN
2 stops25h 12mUnited Airlines
Tue 12/1610:23 amSAN - LHR
1 stop13h 07mUnited Airlines
Deal found 9/9$636
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/36:20 amLHR - SAN
2 stops17h 59mDelta
Mon 11/177:59 pmSAN - LHR
1 stop12h 51mDelta
Deal found 9/11$637
This Netflights deal was found by Cheapflights users on 9/10. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2212:50 pmLHR - SAN
Nonstop11h 20mBritish Airways
Tue 12/26:00 pmSAN - LHR
Nonstop10h 35mBritish Airways
Deal found 9/10$638
This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:30 amLHR - SAN
2 stops19h 05mMultiple Airlines
Wed 10/811:08 amSAN - LHR
2 stops16h 42mMultiple Airlines
Deal found 9/11$639
This The Travel House deal was found by Cheapflights users on 9/11. 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 11/199:20 amLHR - SAN
2 stops31h 45mIcelandair
Sat 11/229:15 pmSAN - LHR
2 stops25h 40mIcelandair
Deal found 9/11$640
This Lufthansa deal was found by Cheapflights users on 9/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:40 amLHR - SAN
1 stop16h 05mLufthansa
Thu 1/81:00 pmSAN - LHR
1 stop12h 40mLufthansa
Deal found 9/11$641
This Lufthansa deal was found by Cheapflights users on 9/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:35 amLHR - SAN
1 stop17h 10mLufthansa
Sat 1/101:00 pmSAN - LHR
1 stop12h 40mLufthansa
Deal found 9/10$642
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:50 pmLHR - SAN
Nonstop11h 20mAmerican Airlines
Wed 12/246:00 pmSAN - LHR
Nonstop10h 35mAmerican Airlines
Deal found 9/9$643
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/312:50 pmLHR - SAN
Nonstop11h 20mAmerican Airlines
Mon 11/176:00 pmSAN - LHR
Nonstop10h 35mAmerican Airlines
Deal found 9/10$644

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 September 11, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Diego that are best for you.

Fly from

Heathrow

Fly to

San Diego

Route

Depart

Return

Price

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 12/9

12:50 pm-4:10 pm

Nonstop11h 20m

San Diego

Mon 1/12

1:35 pm-6:55 am

1 stop33h 20m

$637

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 11/3

6:20 am-4:19 pm

2 stops17h 59m

San Diego

Mon 11/17

7:59 pm-4:50 pm

1 stop12h 51m

$637

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 11/12

6:30 am-11:44 pm

2 stops25h 14m

San Diego

Fri 11/21

6:15 am-8:30 am

2 stops18h 15m

$639

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 10/29

8:20 am-6:04 pm

1 stop16h 44m

San Diego

Sat 11/8

6:00 pm-12:35 pm

Nonstop10h 35m

$665

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 12/9

6:35 am-3:45 pm

1 stop17h 10m

San Diego

Sat 1/10

10:26 am-10:15 am

1 stop15h 49m

$667

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 12/10

6:35 am-3:45 pm

1 stop17h 10m

San Diego

Sun 1/11

10:26 am-10:15 am

1 stop15h 49m

$667

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 12/10

6:35 am-3:45 pm

1 stop17h 10m

San Diego

Thu 1/8

7:00 am-5:55 am

1 stop14h 55m

$667

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 12/9

6:35 am-3:45 pm

1 stop17h 10m

San Diego

Fri 1/9

1:00 pm-9:40 am

1 stop12h 40m

$667

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 10/17

9:30 am-7:35 pm

1 stop18h 05m

San Diego

Sun 10/19

6:15 am-7:40 am

1 stop17h 25m

$672

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sun 11/9

8:40 am-8:37 pm

2 stops19h 57m

San Diego

Thu 11/20

7:00 am-6:20 am

1 stop15h 20m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 24 results
1
2
3

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to San Diego trip
Airports
LHR

For a smooth departure from Heathrow, ensure all liquids are in one small bag to avoid delays at security checks.

Read more about LHRby Ramsey Qubein
SAN

Upon arrival at SAN, use Mobile Passport Control to expedite customs during busy times.

Read more about SANby Blane Bachelor
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

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

Ramsey Qubein

Ramsey Qubein

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

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 August 29, 2025.

Booking 85 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $286). Flying from London Heathrow Airport to San Diego in March is currently the most expensive (average of $366). 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 September 11, 2025.

One of the essential ways to save on airfare from London Heathrow Airport to San Diego is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 4% on airfare.

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

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 September 11, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Iberia 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
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Iberia
7.0
Good
2,929 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
British Airways
6.7
Okay
7,361 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 8 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 11h 20m. British Airways provides one of the quickest options available for as low as $637. 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 $533 on this airline. Additional options worth looking into are British Airways and Iberia, starting at $589 and $599 round-trip. United Airlines is currently priced 30% 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 Scandinavian Airlines, with whom users have recently found tickets for as low as $589. However, be on the lookout for offers from Lufthansa and Brussels Airlines, 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 (73%), Alaska Airlines (73%) and British Airways (73%).

  • 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 $824, our data indicates the cheapest price to be $711. The most popular route (London Heathrow - San Diego), is priced around $531.

  • 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $286). Flying from London Heathrow Airport to San Diego in March is currently the most expensive (average of $366). 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
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City
Alpine

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Alternative routes for Heathrow to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$533Average$715FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$589Average$793FlexibilityNo cancel feeOn-time70%
IberiaCheapest$599Average$804FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$664Average$836FlexibilityNo cancel feeOn-time71%

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