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$234+ Cheap flights from San Diego (SAN) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to London Heathrow are usually found in January or February, booked 80 days in advance, depart on a Wednesday or Sunday and return on a Wednesday

Cheap flight deals from San Diego to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$554
(Virgin Atlantic)

One-way from

$234
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$776

Good round-trip deal

$677 or less

Good one-way deal

$450 or less
From San Diego to London Heathrow
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One-way flight from San Diego to London Heathrow
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Highest demand for flights based on searches. 25% potential increase in price ($315 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Diego to London Heathrow.
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Price to beat on a one-way flight from San Diego to London Heathrow.
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Find flight deals from San Diego to Heathrow

Cheapest flights from San Diego to Heathrow
Explore the most affordable flight options available from San Diego to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Virgin Atlantic deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/19:45 amSAN - LHR
1 stop16h 05mVirgin Atlantic
Wed 10/158:55 pmLHR - SAN
1 stop23h 05mVirgin Atlantic
Deal found 9/10$554
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:35 pmSAN - LHR
1 stop14h 15mLufthansa
Wed 11/198:45 amLHR - SAN
1 stop15h 00mLufthansa
Deal found 9/10$555
This British Airways deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 pmSAN - LHR
Nonstop10h 35mBritish Airways
Wed 12/1012:50 pmLHR - SAN
Nonstop11h 20mBritish Airways
Deal found 9/9$556
This Air Canada deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:10 pmSAN - LHR
1 stop33h 40mAir Canada
Wed 11/262:30 pmLHR - SAN
1 stop34h 54mAir Canada
Deal found 9/10$557
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/249:59 amSAN - LHR
2 stops14h 56mDelta
Thu 10/26:30 amLHR - SAN
1 stop13h 30mDelta
Deal found 9/10$558
This FlightHub deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:41 amSAN - LHR
1 stop12h 34mBritish Airways
Thu 11/2012:50 pmLHR - SAN
Nonstop11h 20mBritish Airways
Deal found 9/11$559
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:00 amSAN - LHR
1 stop18h 40mUnited Airlines
Fri 10/39:30 amLHR - SAN
1 stop18h 05mUnited Airlines
Deal found 9/9$560
This Air Canada deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/218:10 amSAN - LHR
2 stops19h 40mAir Canada
Fri 10/39:30 amLHR - SAN
1 stop18h 05mAir Canada
Deal found 9/9$561
This KLM deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:50 amSAN - LHR
1 stop15h 15mKLM
Thu 12/111:00 pmLHR - SAN
1 stop17h 23mKLM
Deal found 9/9$562
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:46 pmSAN - LHR
1 stop13h 29mDelta
Wed 10/153:15 pmLHR - SAN
1 stop15h 59mDelta
Deal found 9/10$563
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:50 pmSAN - LHR
Nonstop10h 30mBritish Airways
Tue 10/2810:05 amLHR - SAN
1 stop17h 08mBritish Airways
Deal found 9/10$564
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/242:21 pmSAN - LHR
1 stop12h 49mUnited Airlines
Wed 10/11:00 pmLHR - SAN
1 stop16h 24mUnited Airlines
Deal found 9/11$565

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from San Diego to London Heathrow Airport that are best for you.

Fly from

San Diego

Fly to

Heathrow

Route

Depart

Return

Price

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 10/1

9:45 am-9:50 am

1 stop16h 05m

London Heathrow

Wed 10/15

8:55 pm-12:00 pm

1 stop23h 05m

$554

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 9/21

7:00 am-9:40 am

1 stop18h 40m

London Heathrow

Fri 10/3

9:30 am-7:35 pm

1 stop18h 05m

$560

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 9/24

7:00 am-6:25 am

1 stop15h 25m

London Heathrow

Wed 10/22

8:40 am-7:08 pm

2 stops18h 28m

$564

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 10/6

5:15 pm-3:40 pm

1 stop14h 25m

London Heathrow

Wed 10/29

6:35 am-4:45 pm

1 stop17h 10m

$565

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 9/24

9:59 am-8:55 am

2 stops14h 56m

London Heathrow

Thu 10/2

9:00 am-7:06 pm

2 stops18h 06m

$567

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 1/11

5:35 pm-3:50 pm

1 stop14h 15m

London Heathrow

Wed 1/21

6:35 am-3:45 pm

1 stop17h 10m

$567

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 11/12

6:15 am-7:05 am

2 stops16h 50m

London Heathrow

Fri 11/21

6:20 am-4:05 pm

2 stops17h 45m

$567

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 2/26

10:00 am-9:40 pm

2 stops27h 40m

London Heathrow

Sat 3/7

6:40 am-10:55 pm

2 stops24h 15m

$596

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 11/15

8:02 pm-12:50 pm

3 stops56h 48m

$273

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 11/19

8:00 am-12:50 pm

3 stops44h 50m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 20 results
1
2

The best insider tips for San Diego to London Heathrow Airport 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 San Diego to London Heathrow Airport trip
Airports
SAN

Plan to arrive at SAN at least two hours before your flight, especially for international departures, to avoid last-minute stress due to traffic.

Read more about SANby Blane Bachelor
LHR

Take the Heathrow Express for the fastest route into central London, reaching Paddington Station quickly and conveniently.

Read more about LHRby Ramsey Qubein
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 San Diego to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Diego 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 San Diego to London Heathrow Airport

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

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Heathrow. Price data was last updated on August 29, 2025.

The price you pay for your flight from San Diego to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, November is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of $661). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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 SAN to LHR?

Find hourly flight availability from San Diego to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from San Diego to London Heathrow Airport at noon. If you’re flexible enough to do this you can expect to save up to 7% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from San Diego to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Diego to London Heathrow Airport flight should consider departing on Wednesday at noon when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and JetBlue from San Diego to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
JetBlue
7.2
Good
2,913 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
2,929 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,361 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from San Diego to Heathrow. 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 from for flights from San Diego to London Heathrow?

    Most people fly from San Diego (SAN) if they book a flight from San Diego to London Heathrow. On average, San Diego has 8 outbound flights to London Heathrow per day from 10 airlines. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

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

    Virgin Atlantic, United Airlines, and Delta can get you from San Diego to London Heathrow Airport in just under 15h 25m. Your travel time can differ by up to 3h 15m. There are 5469 mi between San Diego and London Heathrow Airport. 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 San Diego to London Heathrow Airport round-trip?

    JetBlue, at $210, was found to be the cheapest airline from San Diego to London Heathrow Airport.Alternate airlines to your destination round-trip include Delta and United Airlines. JetBlue is priced at 76% lower than the current average price of a flight leaving 3 months from now.

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

    The top 3 most reliable airlines when flying from San Diego to London Heathrow Airport are American Airlines (76%), Alaska Airlines (76%) and British Airways (76%).

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

    The cheapest flight price from San Diego to London Heathrow Airport is $429. On average you can expect to pay $2,591. The most popular route, (San Diego - London Heathrow), can usually be booked for $509.

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

    Yes. In addition to deals on San Diego to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Heathrow.

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

    Yes. Cheapflights offers flight deals from San Diego to Heathrow 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 San Diego to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of $661). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Diego to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from San Diego to Heathrow

Discover the top 10 airlines that operate flights from San Diego to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$210Average$906FlexibilityNo cancel feeOn-time62%
DeltaCheapest$553Average$980FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$569Average$830FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$879FlexibilityNo cancel feeOn-time75%
IberiaCheapest$589Average$844FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$589Average$870FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$590Average$783FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$603Average$907FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$620Average$898FlexibilityNo cancel feeOn-time72%
FinnairCheapest$642Average$738FlexibilityNo cancel feeOn-time76%

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