How often are flights from London to San Diego delayed?

About 20% of weekly flights between London and San Diego have experienced delays in the past year, with the average delay time being 142 minutes.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

What is the most punctual flight time for London to San Diego flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

Which airline has the best punctuality record on London to San Diego flights?

Over the last year, American Airlines have had the lowest number of delays on this route, with just 18% of flights being delayed.

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 15h 34m. United Airlines provides one of the quickest options available for as low as $718. 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 United Airlines, with whom users have recently found tickets for as low as $562. However, be on the lookout for offers from Icelandair and JetBlue, as they are both options that can get you from London Heathrow Airport to San Diego for a low price.

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.

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).

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 $851, our data indicates the cheapest price to be $501. The most popular route (London Heathrow - San Diego), is priced around $633.

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 (72%), Alaska Airlines (72%) and British Airways (72%).

What are the most popular airlines that fly from London Heathrow Airport to San Diego?

The most popular airlines flying from London Heathrow Airport to San Diego are British Airways, American Airlines and Iberia. Something to consider prior to booking your flight.

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.

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

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.

$533+ Cheap Flights from London Heathrow Airport to San Diego

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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

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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 Wednesday or Monday and return on a Wednesday

Cheap flight deals from Heathrow to San Diego

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$644 (TravelUp)
One-way from	$533 (Cheapflightsfares)
Popular in	July
Cheapest in	January
Average price	$770
Good round-trip deal	$719 or less
Good one-way deal	$582 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 ($136 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

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 October 27, 2025.

Wed 12/38:45 amLHR - SAN

1 stop15h 00mLufthansa

Wed 12/109:54 amSAN - LHR

1 stop13h 31mLufthansa

Deal found 10/25

$644

Mon 11/248:05 amLHR - SAN

1 stop19h 57mIcelandair

Thu 12/49:05 pmSAN - LHR

2 stops25h 50mIcelandair

Deal found 10/27

$648

Fri 11/78:05 amLHR - SAN

1 stop34h 02mJetBlue

Wed 11/122:52 pmSAN - LHR

1 stop32h 03mJetBlue

Deal found 10/27

$649

Sat 11/229:20 amLHR - SAN

1 stop33h 19mIcelandair

Sat 12/69:05 pmSAN - LHR

1 stop15h 40mIcelandair

Deal found 10/26

$650

Sun 11/99:20 amLHR - SAN

1 stop36h 22mIcelandair

Sun 11/162:52 pmSAN - LHR

1 stop32h 03mIcelandair

Deal found 10/25

$652

Tue 11/257:40 amLHR - SAN

1 stop16h 05mLufthansa

Thu 12/47:00 amSAN - LHR

1 stop14h 55mLufthansa

Deal found 10/25

$660

Wed 11/268:45 amLHR - SAN

1 stop15h 00mLufthansa

Wed 12/312:50 pmSAN - LHR

1 stop12h 50mLufthansa

Deal found 10/27

$661

Tue 11/258:45 amLHR - SAN

1 stop15h 00mLufthansa

Wed 12/32:16 pmSAN - LHR

1 stop12h 59mLufthansa

Deal found 10/25

$662

Tue 11/258:45 amLHR - SAN

1 stop15h 00mLufthansa

Tue 12/212:08 pmSAN - LHR

1 stop14h 07mLufthansa

Deal found 10/25

$664

Tue 12/912:20 pmLHR - SAN

2 stops30h 19mIcelandair

Thu 12/111:57 pmSAN - LHR

2 stops32h 58mIcelandair

Deal found 10/27

$666

Mon 11/248:05 amLHR - SAN

1 stop19h 57mJetBlue

Thu 12/48:34 pmSAN - LHR

1 stop26h 21mJetBlue

Deal found 10/25

$668

Best flights from Heathrow to San Diego
Discover carefully curated flight deals from Heathrow to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2025.

Wed 11/266:35 amLHR - SAN

1 stop17h 10mUnited Airlines

Tue 12/210:23 amSAN - LHR

1 stop13h 07mUnited Airlines

Deal found 10/27

$680

Wed 11/268:20 amLHR - SAN

1 stop15h 34mBritish Airways

Sun 12/74:45 pmSAN - LHR

1 stop30h 05mBritish Airways

Deal found 10/27

$718

Wed 12/106:30 amLHR - SAN

2 stops16h 53mDelta

Wed 12/1711:05 amSAN - LHR

1 stop16h 35mDelta

Deal found 10/26

$723

Wed 12/38:05 pmLHR - SAN

2 stops34h 25mSWISS

Thu 1/810:52 amSAN - LHR

2 stops18h 08mSWISS

Deal found 10/25

$739

Sun 11/231:25 pmLHR - SAN

2 stops30h 38mAir Canada

Wed 12/312:45 pmSAN - LHR

2 stops34h 25mAir Canada

Deal found 10/27

$754

Wed 12/38:30 amLHR - SAN

2 stops20h 18mUnited Airlines

Wed 12/108:45 amSAN - LHR

2 stops15h 10mUnited Airlines

Deal found 10/25

$688

Wed 12/38:20 amLHR - SAN

1 stop15h 28mBritish Airways

Wed 12/106:00 pmSAN - LHR

Nonstop10h 35mBritish Airways

Deal found 10/25

$729

Mon 12/16:00 pmLHR - SAN

1 stop25h 53mUnited Airlines

Mon 12/86:30 amSAN - LHR

2 stops15h 25mUnited Airlines

Deal found 10/25

$719

Thu 11/278:20 amLHR - SAN

1 stop36h 25mBritish Airways

Wed 12/39:37 amSAN - LHR

1 stop13h 13mBritish Airways

Deal found 10/27

$758

Mon 11/2411:35 amLHR - SAN

1 stop13h 53mUnited Airlines

Tue 12/912:50 pmSAN - LHR

1 stop14h 00mUnited Airlines

Deal found 10/27

$721

Thu 11/278:20 amLHR - SAN

1 stop36h 25mBritish Airways

Thu 12/42:36 pmSAN - LHR

1 stop13h 04mBritish Airways

Deal found 10/27

$758

Thu 11/278:20 amLHR - SAN

1 stop36h 25mBritish Airways

Tue 12/29:42 amSAN - LHR

1 stop13h 08mBritish Airways

Deal found 10/27

$758

Last-minute flights from Heathrow to San Diego
Discover last-minute flight deals from Heathrow to San Diego. Data last updated October 27, 2025 and is based on user searches.

Fri 10/318:05 amLHR - SAN

1 stop18h 26mIcelandair

Mon 11/109:05 pmSAN - LHR

2 stops25h 50mIcelandair

Deal found 10/26

$670

Thu 11/69:20 amLHR - SAN

1 stop36h 22mIcelandair

Sat 11/159:05 pmSAN - LHR

1 stop28h 25mIcelandair

Deal found 10/26

$671

Fri 11/78:05 amLHR - SAN

1 stop34h 02mJetBlue

Wed 11/122:52 pmSAN - LHR

1 stop32h 03mJetBlue

Deal found 10/27

$649

Sun 11/99:20 amLHR - SAN

1 stop36h 22mIcelandair

Sun 11/162:52 pmSAN - LHR

1 stop32h 03mIcelandair

Deal found 10/25

$652

Sat 11/229:20 amLHR - SAN

1 stop33h 19mIcelandair

Sat 12/69:05 pmSAN - LHR

1 stop15h 40mIcelandair

Deal found 10/26

$650

Mon 11/248:05 amLHR - SAN

1 stop19h 57mIcelandair

Thu 12/49:05 pmSAN - LHR

2 stops25h 50mIcelandair

Deal found 10/27

$648

Mon 11/248:05 amLHR - SAN

1 stop19h 57mJetBlue

Thu 12/48:34 pmSAN - LHR

1 stop26h 21mJetBlue

Deal found 10/25

$668

Tue 11/257:40 amLHR - SAN

1 stop16h 05mLufthansa

Thu 12/47:00 amSAN - LHR

1 stop14h 55mLufthansa

Deal found 10/25

$660

Tue 11/258:45 amLHR - SAN

1 stop15h 00mLufthansa

Wed 12/32:16 pmSAN - LHR

1 stop12h 59mLufthansa

Deal found 10/25

$662

Tue 11/258:45 amLHR - SAN

1 stop15h 00mLufthansa

Tue 12/212:08 pmSAN - LHR

1 stop14h 07mLufthansa

Deal found 10/25

$664

Wed 11/268:45 amLHR - SAN

1 stop15h 00mLufthansa

Wed 12/312:50 pmSAN - LHR

1 stop12h 50mLufthansa

Deal found 10/27

$661

One-way flights from Heathrow to San Diego
Search for one-way flight options from Heathrow to San Diego. Find affordable one-way fares based on user searches. Data last updated October 27, 2025.

Sat 1/1712:50 pmLHR - SAN

Nonstop11h 20mFinnair

Deal found 10/27

$533

Thu 1/2212:50 pmLHR - SAN

Nonstop11h 20mBritish Airways

Deal found 10/27

$536

Tue 1/64:20 pmLHR - SAN

3 stops30h 32mUnited Airlines

Deal found 10/25

$562

Sat 1/174:20 pmLHR - SAN

3 stops30h 32mUnited Airlines

Deal found 10/27

$564

Wed 11/192:50 pmLHR - SAN

3 stops30h 33mMultiple Airlines

Deal found 10/26

$566

Tue 12/238:15 pmLHR - SAN

1 stop27h 30mLufthansa

Deal found 10/26

$567

Tue 12/238:05 pmLHR - SAN

2 stops51h 47mMultiple Airlines

Deal found 10/26

$570

Wed 11/197:25 amLHR - SAN

1 stop20h 26mIcelandair

Deal found 10/26

$574

Fri 11/78:05 amLHR - SAN

2 stops58h 34mIcelandair

Deal found 10/26

$580

Sat 12/278:20 amLHR - SAN

1 stop17h 50mBritish Airways

Deal found 10/25

$587

Sun 11/302:50 pmLHR - SAN

3 stops41h 09mMultiple Airlines

Deal found 10/27

$589

Cheapflights Fare Finder

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

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 11/26

6:35 am-3:45 pm

1 stop17h 10m

San Diego

Tue 12/2

10:23 am-7:30 am

1 stop13h 07m

$680

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 12/3

8:30 am-8:48 pm

2 stops20h 18m

San Diego

Wed 12/10

8:45 am-7:55 am

2 stops15h 10m

$688

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 11/26

8:20 am-3:54 pm

1 stop15h 34m

San Diego

Sun 12/7

4:45 pm-6:50 am

1 stop30h 05m

$718

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 12/1

6:00 pm-11:53 am

1 stop25h 53m

San Diego

Mon 12/8

6:30 am-5:55 am

2 stops15h 25m

$719

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Mon 11/24

11:35 am-5:28 pm

1 stop13h 53m

San Diego

Tue 12/9

12:50 pm-10:50 am

1 stop14h 00m

$721

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 12/10

6:30 am-3:23 pm

2 stops16h 53m

San Diego

Wed 12/17

11:05 am-11:40 am

1 stop16h 35m

$723

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 12/3

8:20 am-3:48 pm

1 stop15h 28m

San Diego

Wed 12/10

6:00 pm-12:35 pm

Nonstop10h 35m

$729

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Wed 12/3

8:05 pm-10:30 pm

2 stops34h 25m

San Diego

Thu 1/8

10:52 am-1:00 pm

2 stops18h 08m

$739

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Sun 11/23

1:25 pm-12:03 pm

2 stops30h 38m

San Diego

Wed 12/3

12:45 pm-7:10 am

2 stops34h 25m

$754

LondonSan Diego

LHR - SAN

LHRSAN

London Heathrow

Thu 11/27

8:20 am-12:45 pm

1 stop36h 25m

San Diego

Wed 12/3

9:37 am-6:50 am

1 stop13h 13m

$758

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 23 results

Compare providers for flights from Heathrow to San Diego

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 October.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*1 star
StudentUniverse	Price Accuracy3 stars	Trust 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 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

Prices

Delays

How far ahead should I book a flight from London Heathrow Airport to San Diego?

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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Diego (average of $455). 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?

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 evening could potentially save you up to 25% on airfare.

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

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.

SAN

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

Our travel experts

Blane Bachelor

Expert on SAN

Ramsey Qubein

Expert on LHR

Reviews of airlines servicing San Diego

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

8,997 reviews

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

8,997 reviews

United Airlines

7.4

Good

8,997 reviews

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

11,032 reviews

United Airlines

7.4

Good

8,997 reviews

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

3,001 reviews

United Airlines

7.4

Good

8,997 reviews

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

7,476 reviews

United Airlines

7.4

Good

8,997 reviews

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

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 0 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 15h 34m. United Airlines provides one of the quickest options available for as low as $718. 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 United Airlines, with whom users have recently found tickets for as low as $562. However, be on the lookout for offers from Icelandair and JetBlue, 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 (72%), Alaska Airlines (72%) and British Airways (72%).
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 $851, our data indicates the cheapest price to be $501. The most popular route (London Heathrow - San Diego), is priced around $633.
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 $455). 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

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Other flights to San Diego

Top 4 airlines flying from Heathrow to San Diego

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$533	Average$710	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$589	Average$807	FlexibilityNo cancel fee	On-time70%
Iberia	Cheapest$599	Average$804	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$664	Average$843	FlexibilityNo cancel fee	On-time71%

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$533+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.

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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 Wednesday or Monday and return on a Wednesday

Cheap flight deals from Heathrow to San Diego

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Find flight deals from Heathrow to San Diego

Cheapest flights from Heathrow to San DiegoExplore 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 October 27, 2025.

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 October 27, 2025.

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

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 October.

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.

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?

What is the cheapest month to book a flight from London Heathrow Airport to San Diego?

What is the cheapest time of day to fly from LHR to SAN?

How often are flights from London to San Diego delayed?

What is the most punctual flight time for London to San Diego flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to San Diego flights?

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

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to San Diego trip

Airports

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Reviews of airlines servicing San Diego

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.

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?

How long is the flight from London Heathrow Airport to San Diego?

What are the cheapest airlines flying from London Heathrow Airport to San Diego round-trip?

What are the cheapest airlines to fly from London Heathrow Airport to San Diego one-way?

What are the most reliable airlines from London Heathrow Airport to San Diego?

What are the cheapest flights from London Heathrow Airport to San Diego?

Can I find deals for flights from Heathrow to San Diego that include hotel bookings?

How can I find direct flights from Heathrow to San Diego?

Can I find deals for business class flights from Heathrow to San Diego?

What is the cheapest month to book a flight from London Heathrow Airport to San Diego?

Traveling to a place near San Diego?

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Alternative routes for Heathrow to San Diego

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Top 4 airlines flying from Heathrow to San Diego

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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 October 27, 2025.