HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$589+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAN
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Heathrow to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 Tuesday 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 April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$624
(United Airlines)

One-way from

$589
(Cheapflightsfares)

Popular in

August

Cheapest in

January

Average price

$733

Good round-trip deal

$700 or less

Good one-way deal

$704 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. 14% potential increase in price ($133 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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

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 April 3, 2025.

This United Airlines deal was found by Cheapflights users on 4/2. 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 9/242:10 pmLHR - SAN
1 stop33h 57mUnited Airlines
Thu 10/24:10 pmSAN - LHR
1 stop12h 10mUnited Airlines
Deal found 4/2$624
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Mon 4/287:25 amLHR - SAN
1 stop16h 00mLufthansa
Sat 5/172:30 pmSAN - LHR
1 stop12h 40mLufthansa
Deal found 4/2$625
This The Travel House deal was found by Cheapflights users on 4/2. 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.
Thu 5/19:30 amLHR - SAN
1 stop18h 15mAir Canada
Fri 5/98:00 amSAN - LHR
1 stop14h 30mAir Canada
Deal found 4/2$627
This Booking.com deal was found by Cheapflights users on 4/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2111:30 amLHR - SAN
Nonstop11h 20mBritish Airways
Mon 5/54:40 pmSAN - LHR
Nonstop10h 45mBritish Airways
Deal found 4/2$630
This Ticket deal was found by Cheapflights users on 4/2. 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 4/2111:30 amLHR - SAN
Nonstop11h 20mMultiple Airlines
Mon 5/53:10 pmSAN - LHR
1 stop13h 35mMultiple Airlines
Deal found 4/2$631
This Delta deal was found by Cheapflights users on 4/2. 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.
Thu 4/246:30 amLHR - SAN
2 stops18h 22mDelta
Sat 5/1011:15 amSAN - LHR
1 stop16h 05mDelta
Deal found 4/2$648
This American Airlines deal was found by Cheapflights users on 4/2. 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 4/2111:30 amLHR - SAN
Nonstop11h 20mAmerican Airlines
Mon 5/52:27 pmSAN - LHR
1 stop14h 18mAmerican Airlines
Deal found 4/2$649
This Justfly.com deal was found by Cheapflights users on 4/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/298:45 amLHR - SAN
2 stops19h 55mSWISS
Tue 5/134:00 pmSAN - LHR
2 stops17h 50mSWISS
Deal found 4/2$656
This The Travel House deal was found by Cheapflights users on 4/2. 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 9/242:10 pmLHR - SAN
2 stops59h 39mAustrian Airlines
Fri 10/310:45 amSAN - LHR
2 stops37h 35mAustrian Airlines
Deal found 4/2$676
This Finnair deal was found by Cheapflights users on 4/2. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/302:55 pmLHR - SAN
Nonstop11h 05mFinnair
Sun 5/1110:19 amSAN - LHR
1 stop17h 56mFinnair
Deal found 4/2$682
This Cheapflightsfares deal was found by Cheapflights users on 4/2. 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.
Fri 5/92:55 pmLHR - SAN
Nonstop11h 05mIberia
Mon 6/97:50 pmSAN - LHR
Nonstop10h 30mIberia
Deal found 4/2$684
This EaseMyTrip deal was found by Cheapflights users on 4/2. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/119:55 amLHR - SAN
1 stop15h 02mVirgin Atlantic
Sun 4/132:15 pmSAN - LHR
1 stop14h 55mVirgin Atlantic
Deal found 4/2$709

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 April 3, 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

Wed 9/24

2:10 pm-11:52 am

1 stop29h 42m

San Diego

Wed 10/1

11:06 am-11:45 am

1 stop16h 39m

$624

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 4/28

7:25 am-3:25 pm

1 stop16h 00m

San Diego

Sat 5/17

2:30 pm-11:10 am

1 stop12h 40m

$625

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 5/1

9:30 am-7:45 pm

1 stop18h 15m

San Diego

Fri 5/9

8:00 am-6:30 am

1 stop14h 30m

$627

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 4/21

11:30 am-2:50 pm

Nonstop11h 20m

San Diego

Mon 5/5

4:40 pm-11:25 am

Nonstop10h 45m

$630

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 4/21

11:30 am-2:50 pm

Nonstop11h 20m

San Diego

Mon 5/5

3:10 pm-12:45 pm

1 stop13h 35m

$631

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 4/24

6:30 am-4:11 pm

2 stops17h 41m

San Diego

Sat 5/10

8:00 am-8:50 am

2 stops16h 50m

$648

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 4/21

11:30 am-2:50 pm

Nonstop11h 20m

San Diego

Mon 5/5

2:27 pm-12:45 pm

1 stop14h 18m

$649

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Tue 4/29

8:45 am-8:40 pm

2 stops19h 55m

San Diego

Tue 5/13

4:00 pm-5:50 pm

2 stops17h 50m

$656

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 9/24

2:10 pm-5:49 pm

2 stops59h 39m

San Diego

Fri 10/3

10:45 am-8:20 am

2 stops37h 35m

$676

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 4/30

2:55 pm-6:00 pm

Nonstop11h 05m

San Diego

Sun 5/11

10:19 am-12:15 pm

1 stop17h 56m

$682

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 27 results
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 April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
StudentUniversePrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
JetabroadPrice 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 28, 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 April 3, 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 in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 7% 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 April 3, 2025.

The most flights from LHR to SAN are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

Plan your trip to San Diego by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 April 3, 2025.
Peruse reviews from past customers who have flown with Delta, Finnair and Austrian Airlines from London to San Diego to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,897 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
771 reviews
Delta
8.0
Very good
7,897 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,574 reviews
Delta
8.0
Very good
7,897 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,619 reviews
Delta
8.0
Very good
7,897 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 United Airlines. Our recent data shows that you can find tickets from as low as $624 on this airline. Additional options worth looking into are Lufthansa and Air Canada, starting at $625 and $627 round-trip. United Airlines is currently priced 18% 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 $589. However, be on the lookout for offers from WestJet and British Airways, 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 Aer Lingus (80%), Finnair (80%) and Iberia (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 $1,453, our data indicates the cheapest price to be $635. The most popular route (London Heathrow - San Diego), is priced around $569.

  • 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
El Cajon
Chula Vista
Lemon Grove
National City
Imperial Beach
La Mesa
Alpine
Poway
Santee
Coronado
Borrego Springs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Los Angeles flights
Heathrow to San Francisco flights
Heathrow to Las Vegas flights
London City to Los Angeles flights
Gatwick to San Francisco flights
London City to San Francisco flights
Gatwick to Los Angeles flights
Heathrow to Ontario flights
Luton to Los Angeles flights
Heathrow to Santa Ana flights
London City to Las Vegas flights
Gatwick to Las Vegas flights
Heathrow to Long Beach flights
Heathrow to Burbank flights
Heathrow to San Jose flights
Heathrow to Oakland flights
Stansted to Los Angeles flights
Gatwick to San Jose flights
Gatwick to Oakland flights
Stansted to San Francisco flights
Luton to San Francisco flights
Gatwick to San Diego flights
Stansted to Las Vegas flights
Luton to Las Vegas flights
Heathrow to Reno flights
Heathrow to Sacramento flights
Gatwick to Sacramento flights
Gatwick to Ontario flights
Heathrow to Santa Rosa flights
Heathrow to Palm Springs flights
Heathrow to Santa Barbara flights
Gatwick to Palm Springs flights
Heathrow to Medford flights

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 April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$523Average$671FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$553Average$743FlexibilityNo cancel feeOn-time70%
IberiaCheapest$576Average$766FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$579Average$748FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.