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$384+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to San Diego are usually found in January or September, booked 64 days in advance, depart on a Monday or Tuesday 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 diciembre 12, 2025.

This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/304:00 pmLHR - SAN
1 stop25h 19mDelta
mié. 1/1410:04 pmSAN - LHR
1 stop24h 46mDelta
Deal found 12/10$818
This Expedia deal was found by Cheapflights users on 12/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/245:50 pmLHR - SAN
1 stop29h 55mLufthansa
lun. 1/55:40 pmSAN - LHR
1 stop29h 45mLufthansa
Deal found 12/10$854
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/304:00 pmLHR - SAN
1 stop25h 19mDelta
vie. 1/168:05 amSAN - LHR
2 stops18h 45mDelta
Deal found 12/10$858
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/241:30 pmLHR - SAN
2 stops18h 45mUnited Airlines
lun. 1/59:30 pmSAN - LHR
1 stop25h 10mUnited Airlines
Deal found 12/10$870
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/315:20 pmLHR - SAN
1 stop30h 13mDelta
mié. 1/1410:37 amSAN - LHR
2 stops15h 23mDelta
Deal found 12/10$904
This TravelUp deal was found by Cheapflights users on 12/11. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/2911:05 amLHR - SAN
1 stop17h 58mVirgin Atlantic
mié. 1/78:05 amSAN - LHR
1 stop14h 20mVirgin Atlantic
Deal found 12/11$925
This ChecknFly deal was found by Cheapflights users on 12/10. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/2612:05 pmLHR - SAN
1 stop16h 11mLufthansa
lun. 1/57:55 pmSAN - LHR
2 stops26h 45mLufthansa
Deal found 12/10$931
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/277:40 amLHR - SAN
1 stop34h 04mUnited Airlines
lun. 1/57:55 pmSAN - LHR
2 stops26h 45mUnited Airlines
Deal found 12/10$940
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/2712:05 pmLHR - SAN
1 stop17h 51mUnited Airlines
mar. 1/610:40 pmSAN - LHR
1 stop13h 55mUnited Airlines
Deal found 12/11$942
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/315:20 pmLHR - SAN
1 stop30h 13mDelta
dom. 1/186:35 amSAN - LHR
2 stops15h 50mDelta
Deal found 12/10$944

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 diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$742
(Kiwi.com)

One-way from

$384

Popular in

July

Cheapest in

January

Average price

$987

Good round-trip deal

$897 or less

Good one-way deal

$579 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. 13% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 diciembre 12, 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

dom. 1/25

8:30 am-10:33 pm

2 stops22h 03m

San Diego

dom. 2/1

4:10 pm-9:40 am

1 stop33h 30m

$745

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

sáb. 2/14

10:15 am-6:50 pm

1 stop16h 35m

San Diego

mié. 2/18

9:45 am-9:40 am

2 stops15h 55m

$745

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

lun. 1/26

12:50 pm-4:10 pm

Nonstop11h 20m

San Diego

lun. 2/9

9:24 am-7:50 am

1 stop14h 26m

$747

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

vie. 3/13

12:50 pm-5:10 pm

Nonstop11h 20m

San Diego

mar. 3/17

3:19 pm-11:35 am

1 stop13h 16m

$759

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

mar. 2/10

7:25 am-7:50 pm

1 stop20h 25m

San Diego

vie. 2/20

9:00 pm-10:00 pm

1 stop17h 00m

$761

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

jue. 2/12

10:00 am-10:00 pm

1 stop20h 00m

San Diego

jue. 2/19

8:00 am-7:30 am

1 stop15h 30m

$765

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

jue. 2/12

10:05 am-8:49 pm

1 stop18h 44m

San Diego

lun. 2/16

10:30 am-7:30 am

1 stop13h 00m

$765

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

vie. 2/13

1:35 pm-10:44 pm

1 stop17h 09m

San Diego

mié. 2/18

11:04 am-7:55 am

1 stop12h 51m

$765

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

vie. 3/13

6:30 am-6:21 pm

2 stops18h 51m

San Diego

mar. 3/17

6:21 am-7:05 am

2 stops17h 44m

$771

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

sáb. 2/14

8:40 am-8:53 pm

2 stops20h 13m

San Diego

mié. 2/18

6:20 am-7:50 am

2 stops17h 30m

$771

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 22 results
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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 December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-San Diego flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 2025.

Booking 64 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 $454). Flying from London Heathrow Airport to San Diego in August is currently the most expensive (average of $555). 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 diciembre 12, 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 evening could potentially save you up to 24% on airfare.

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
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

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 diciembre 12, 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
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

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
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

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
7.2
Good
11,050 reviews
United Airlines
7.4
Good
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

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
3,045 reviews
United Airlines
7.4
Good
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

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
7,571 reviews
United Airlines
7.4
Good
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

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 11h 20m. United Airlines provides one of the quickest options available for as low as $759. 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 31% 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 $490. However, be on the lookout for offers from British Airways and Lufthansa, 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 (62%), Alaska Airlines (62%) and British Airways (62%).

  • 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 $782, our data indicates the cheapest price to be $536. The most popular route (London Heathrow - San Diego), is priced around $432.

  • 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 $454). Flying from London Heathrow Airport to San Diego in August is currently the most expensive (average of $555). 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
La Mesa
Poway
Lemon Grove
Julian
National City

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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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$533Average$710FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$589Average$826FlexibilityNo cancel feeOn-time70%
IberiaCheapest$599Average$784FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$664Average$849FlexibilityNo cancel feeOn-time71%

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