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$626+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
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 89 days in advance, depart on a Tuesday 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 July 28, 2025.

Round-trip from

$655
(Gotogate)

One-way from

$626
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$1,032

Good round-trip deal

$715 or less

Good one-way deal

$715 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. 17% potential increase in price ($162 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 July 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 July 28, 2025.

This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:55 amLHR - SAN
1 stop16h 30mMultiple Airlines
Sat 12/136:10 pmSAN - LHR
1 stop33h 40mMultiple Airlines
Deal found 7/26$655
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/79:30 amLHR - SAN
1 stop18h 05mAir Canada
Sun 9/288:10 amSAN - LHR
2 stops19h 40mAir Canada
Deal found 7/26$657
This Lufthansa deal was found by Cheapflights users on 7/28. 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.
Fri 10/246:55 amLHR - SAN
1 stop16h 30mLufthansa
Fri 11/147:00 amSAN - LHR
1 stop14h 55mLufthansa
Deal found 7/28$659
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 10/156:30 amLHR - SAN
2 stops17h 20mUnited Airlines
Sat 11/1512:43 pmSAN - LHR
1 stop12h 57mUnited Airlines
Deal found 7/28$662
This SWISS deal was found by Cheapflights users on 7/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:40 pmLHR - SAN
2 stops35h 47mSWISS
Tue 10/211:59 pmSAN - LHR
2 stops19h 51mSWISS
Deal found 7/28$664
This Netflights 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/12:55 pmLHR - SAN
Nonstop11h 05mBritish Airways
Mon 9/154:40 pmSAN - LHR
Nonstop10h 45mBritish Airways
Deal found 7/26$671

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, 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

Fri 10/10

6:55 am-3:25 pm

1 stop16h 30m

San Diego

Sat 12/13

6:10 pm-11:50 am

1 stop33h 40m

$655

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sun 9/7

9:30 am-7:35 pm

1 stop18h 05m

San Diego

Sun 9/28

8:10 am-11:50 am

2 stops19h 40m

$657

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Fri 10/24

6:55 am-3:25 pm

1 stop16h 30m

San Diego

Fri 11/14

7:00 am-5:55 am

1 stop14h 55m

$659

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 10/15

6:30 am-3:50 pm

2 stops17h 20m

San Diego

Sat 11/15

12:43 pm-9:40 am

1 stop12h 57m

$662

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 10/16

6:40 pm-10:27 pm

2 stops35h 47m

San Diego

Tue 10/21

1:59 pm-5:50 pm

2 stops19h 51m

$664

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 9/1

2:55 pm-6:00 pm

Nonstop11h 05m

San Diego

Mon 9/15

4:40 pm-11:25 am

Nonstop10h 45m

$671

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 10/11

2:10 pm-7:51 am

2 stops25h 41m

$626

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sat 8/30

8:50 am-7:48 pm

2 stops18h 58m

$643

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 9/2

7:25 am-3:25 pm

1 stop16h 00m

$646

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 10/14

2:10 pm-1:20 pm

1 stop31h 10m

$666

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 12 results
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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 July 25, 2025.

Booking 89 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 July 28, 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 11% on airfare.

Weekly flight availability from London Heathrow Airport to San Diego

Explore weekly flight availability from Heathrow to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2025.

The most flights from LHR to SAN are scheduled on a Monday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

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, 2025.
See what other customers who have flown with Austrian Airlines, SWISS, and United Airlines 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.
Austrian Airlines
7.6
Good
820 reviews

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
820 reviews
Austrian Airlines
7.6
Good
820 reviews

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
SWISS
7.6
Good
1,679 reviews
Austrian Airlines
7.6
Good
820 reviews

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
United Airlines
7.4
Good
8,892 reviews
Austrian Airlines
7.6
Good
820 reviews

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
WestJet
7.2
Good
2,968 reviews
Austrian Airlines
7.6
Good
820 reviews

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Air Canada
7.1
Good
9,813 reviews
Austrian Airlines
7.6
Good
820 reviews

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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 7 daily inbound flights from London Heathrow from 4 different airlines.

  • 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 Air Canada. Our recent data shows that you can find tickets from as low as $657 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at $659 and $662 round-trip. Air Canada is currently priced 13% 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 Aer Lingus, with whom users have recently found tickets for as low as $643. However, be on the lookout for offers from Lufthansa and WestJet, 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 (79%), Alaska Airlines (79%) and British Airways (79%).

  • 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 $4,500, our data indicates the cheapest price to be $614. The most popular route (London Heathrow - San Diego), is priced around $571.

  • 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
Coronado
Poway
National City
Lemon Grove
Imperial Beach
La Mesa
Alpine
Santee

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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$533Average$710FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$572Average$756FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$579Average$780FlexibilityNo cancel feeOn-time71%
IberiaCheapest$599Average$780FlexibilityNo cancel feeOn-time77%

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