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$332+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to London Heathrow are usually found in January or October, booked 46 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

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 July 29, 2025.

Round-trip from

$611
(Air Canada)

One-way from

$332
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,231

Good round-trip deal

$714 or less

Good one-way deal

$558 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. 26% potential increase in price ($317 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 July 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 July 29, 2025.

This Air Canada deal was found by Cheapflights users on 7/29. 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 8/1912:25 pmSAN - LHR
2 stops34h 05mAir Canada
Wed 8/272:05 pmLHR - SAN
2 stops29h 30mAir Canada
Deal found 7/29$609
This Delta deal was found by Cheapflights users on 7/29. 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.
Sun 8/178:05 amSAN - LHR
1 stop21h 05mDelta
Sun 8/3111:30 amLHR - SAN
2 stops19h 24mDelta
Deal found 7/29$612
This Ovago deal was found by Cheapflights users on 7/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:22 pmSAN - LHR
1 stop13h 23mBritish Airways
Mon 8/1111:15 amLHR - SAN
1 stop16h 23mBritish Airways
Deal found 7/29$614
This Austrian Airlines deal was found by Cheapflights users on 7/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:40 amSAN - LHR
2 stops28h 00mAustrian Airlines
Mon 10/1310:25 amLHR - SAN
2 stops41h 54mAustrian Airlines
Deal found 7/29$624
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:25 pmSAN - LHR
1 stop15h 25mMultiple Airlines
Sat 10/46:55 amLHR - SAN
1 stop16h 30mMultiple Airlines
Deal found 7/27$626
This Booking.com deal was found by Cheapflights users on 7/27. 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.
Wed 9/1010:54 amSAN - LHR
2 stops22h 11mLufthansa
Thu 9/256:30 amLHR - SAN
2 stops16h 55mLufthansa
Deal found 7/27$635
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:40 amSAN - LHR
1 stop15h 40mUnited Airlines
Sat 8/307:25 amLHR - SAN
1 stop16h 00mUnited Airlines
Deal found 7/28$646
This eDestinos deal was found by Cheapflights users on 7/27. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/123:01 pmSAN - LHR
1 stop15h 24mIberia
Mon 9/291:30 pmLHR - SAN
1 stop16h 13mIberia
Deal found 7/27$654

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 July 29, 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

Sat 9/13

10:30 pm-6:30 am

2 stops24h 00m

London Heathrow

Sun 10/5

9:30 am-7:35 pm

1 stop18h 05m

$611

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 8/17

6:15 am-8:55 am

1 stop18h 40m

London Heathrow

Sat 8/30

9:00 am-8:44 pm

2 stops19h 44m

$612

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 9/18

7:32 pm-12:50 pm

1 stop33h 18m

London Heathrow

Wed 10/8

2:55 pm-6:00 pm

Nonstop11h 05m

$615

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 8/23

12:01 pm-7:40 am

1 stop35h 39m

London Heathrow

Sat 8/30

10:50 am-3:25 pm

1 stop36h 35m

$616

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 1/25

5:35 pm-3:50 pm

1 stop14h 15m

London Heathrow

Fri 2/6

6:30 am-5:49 pm

2 stops19h 19m

$622

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 9/25

12:25 pm-11:50 am

1 stop15h 25m

London Heathrow

Sat 10/4

6:55 am-3:25 pm

1 stop16h 30m

$626

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Fri 9/12

3:01 pm-2:25 pm

1 stop15h 24m

London Heathrow

Mon 9/29

1:30 pm-9:43 pm

1 stop16h 13m

$654

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 9/10

8:24 am-3:35 pm

2 stops23h 11m

$332

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Fri 10/24

2:05 pm-12:05 pm

1 stop14h 00m

$333

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 9/13

8:55 pm-6:30 am

1 stop25h 35m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 13 results
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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 July 25, 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 46 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 $1,097). 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 July 29, 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. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Diego to London Heathrow Airport

Explore weekly flight availability from San Diego to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

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

Reviews of airlines servicing 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 July 29, 2025.
Read reviews from past customers who have flown Delta, United 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.
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
JetBlue
7.3
Good
2,913 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,972 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.1
Good
9,826 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

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

    Air Canada, at $611, was found to be the cheapest airline from San Diego to London Heathrow Airport.Alternate airlines to your destination round-trip include Delta and British Airways. Air Canada is priced at 32% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $333 on WestJet. Other airlines that offer cheap prices include JetBlue from $357 and Air Canada from $371 one-way.

  • 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 (80%), Alaska Airlines (80%) and British Airways (80%).

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

    The cheapest flight price from San Diego to London Heathrow Airport is $437. On average you can expect to pay $2,684. The most popular route, (San Diego - London Heathrow), can usually be booked for $515.

  • 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 $1,097). 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
Harrow
Canterbury
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Dartford
Broadway
Aylesbury
Chelmsford
Folkestone
Southend-on-Sea
Chichester
Swindon

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Alternative routes for San Diego to Heathrow

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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$580Average$910FlexibilityNo cancel feeOn-time62%
KLMCheapest$580Average$879FlexibilityNo cancel feeOn-time75%
DeltaCheapest$586Average$980FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$589Average$818FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$590Average$783FlexibilityNo cancel feeOn-time76%
FinnairCheapest$595Average$692FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$607Average$906FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$620Average$898FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$621Average$897FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$626Average$895FlexibilityNo cancel feeOn-time70%

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