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$405+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Find cheap flights from San Diego to Heathrow with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from San Diego to London Heathrow are usually found in October or November, booked 34 days in advance, depart on a Wednesday or Sunday and return on a Monday

Cheap 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 December 18, 2025.

This Orbitz deal was found by Cheapflights users on 12/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 amSAN - LHR
1 stop15h 45mLufthansa
Fri 1/238:45 amLHR - SAN
1 stop15h 00mLufthansa
Deal found 12/18$649
This Orbitz deal was found by Cheapflights users on 12/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:00 amSAN - LHR
1 stop14h 40mMultiple Airlines
Wed 1/146:50 amLHR - SAN
2 stops21h 57mMultiple Airlines
Deal found 12/18$659
This Delta deal was found by Cheapflights users on 12/18. 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 12/316:15 amSAN - LHR
1 stop16h 10mDelta
Thu 1/156:30 amLHR - SAN
2 stops19h 33mDelta
Deal found 12/18$660
This Delta deal was found by Cheapflights users on 12/18. 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 12/316:15 amSAN - LHR
2 stops18h 30mDelta
Fri 1/236:30 amLHR - SAN
2 stops19h 30mDelta
Deal found 12/18$665
This American Airlines deal was found by Cheapflights users on 12/18. 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.
Wed 12/319:40 amSAN - LHR
1 stop13h 10mAmerican Airlines
Wed 1/1412:50 pmLHR - SAN
Nonstop11h 20mAmerican Airlines
Deal found 12/18$677
This Ovago deal was found by Cheapflights users on 12/18. 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.
Wed 12/319:00 amSAN - LHR
1 stop16h 40mSWISS
Wed 1/149:00 amLHR - SAN
2 stops22h 05mSWISS
Deal found 12/18$678
This oojo deal was found by Cheapflights users on 12/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:15 amSAN - LHR
1 stop16h 35mBritish Airways
Wed 1/143:00 pmLHR - SAN
1 stop15h 50mBritish Airways
Deal found 12/18$686
This Ovago deal was found by Cheapflights users on 12/18. 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.
Wed 12/3111:00 amSAN - LHR
1 stop14h 40mLufthansa
Thu 1/2211:35 amLHR - SAN
1 stop13h 53mLufthansa
Deal found 12/18$707
This Ovago deal was found by Cheapflights users on 12/18. 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.
Wed 12/316:30 amSAN - LHR
1 stop19h 10mSWISS
Thu 1/159:00 amLHR - SAN
2 stops21h 33mSWISS
Deal found 12/18$708
This FlightHub deal was found by Cheapflights users on 12/18. 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 12/314:15 pmSAN - LHR
2 stops17h 25mScandinavian Airlines
Thu 1/2210:20 amLHR - SAN
2 stops20h 27mScandinavian Airlines
Deal found 12/18$715
This Ovago deal was found by Cheapflights users on 12/18. 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.
Wed 12/314:25 pmSAN - LHR
1 stop12h 50mBritish Airways
Thu 1/2212:50 pmLHR - SAN
Nonstop11h 20mBritish Airways
Deal found 12/18$725

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$638
(Cheapflightsfares)

One-way from

$405
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,061

Good round-trip deal

$589 or less

Good one-way deal

$404 or less
Provider with most accurate pricing for San Diego-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-London Heathrow flights.
Search Deals
From San Diego to London Heathrow
Search Deals
One-way flight from San Diego to London Heathrow
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($318 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from San Diego to London Heathrow.
Search Deals
Price to beat on a one-way flight from San Diego to London Heathrow.
Search Deals

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 December 18, 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

Sun 2/15

12:45 pm-11:50 am

1 stop15h 05m

London Heathrow

Wed 2/25

6:35 am-3:45 pm

1 stop17h 10m

$653

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 2/16

12:45 pm-11:50 am

1 stop15h 05m

London Heathrow

Wed 2/25

6:35 am-3:45 pm

1 stop17h 10m

$653

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 2/14

9:00 pm-8:45 pm

1 stop15h 45m

London Heathrow

Sun 2/22

7:45 am-7:47 pm

1 stop20h 02m

$659

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 1/7

9:55 am-7:25 am

1 stop13h 30m

London Heathrow

Tue 1/13

11:10 am-11:05 pm

2 stops19h 55m

$667

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 2/3

7:55 pm-4:50 pm

1 stop12h 55m

London Heathrow

Fri 2/13

11:45 am-11:02 pm

2 stops19h 17m

$668

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Fri 2/13

9:00 pm-10:00 pm

1 stop17h 00m

London Heathrow

Sun 2/22

7:45 am-7:47 pm

1 stop20h 02m

$679

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Mon 1/5

7:55 pm-7:25 am

1 stop27h 30m

London Heathrow

Thu 1/29

1:00 pm-11:53 am

1 stop30h 53m

$680

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sun 2/15

6:00 pm-12:35 pm

Nonstop10h 35m

London Heathrow

Tue 2/24

12:50 pm-4:10 pm

Nonstop11h 20m

$681

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Sat 1/10

3:30 pm-8:45 pm

1 stop21h 15m

London Heathrow

Sat 1/24

8:05 am-7:15 pm

1 stop19h 10m

$684

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 2/18

9:00 pm-9:40 pm

1 stop16h 40m

London Heathrow

Mon 2/23

8:05 am-7:47 pm

1 stop19h 42m

$684

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 21 results
1
2
3

Compare providers for flights from San Diego to Heathrow

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 San Diego to Heathrow in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice 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 San Diego-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Diego-London Heathrow Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Diego-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Diego-London Heathrow Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-London Heathrow Airport 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 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 December 12, 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 34 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, December is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of $469). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of $830). 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 December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from San Diego to London Heathrow Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 6% on your trip compared to booking a flight in the morning.

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.

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your 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

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 December 18, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines 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
7.9
Good
8,009 reviews

Entertainment

7.9

Boarding

8.1

Overall

7.9

Food

7.3

Crew

8.5

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
7.9
Good
8,009 reviews
Delta
7.9
Good
8,009 reviews

Entertainment

7.9

Boarding

8.1

Overall

7.9

Food

7.3

Crew

8.5

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
9,093 reviews
Delta
7.9
Good
8,009 reviews

Entertainment

7.9

Boarding

8.1

Overall

7.9

Food

7.3

Crew

8.5

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.
American Airlines
7.2
Good
11,054 reviews
Delta
7.9
Good
8,009 reviews

Entertainment

7.9

Boarding

8.1

Overall

7.9

Food

7.3

Crew

8.5

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.
Iberia
7.0
Good
3,053 reviews
Delta
7.9
Good
8,009 reviews

Entertainment

7.9

Boarding

8.1

Overall

7.9

Food

7.3

Crew

8.5

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.
British Airways
6.7
Okay
7,586 reviews
Delta
7.9
Good
8,009 reviews

Entertainment

7.9

Boarding

8.1

Overall

7.9

Food

7.3

Crew

8.5

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 6 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?

    United Airlines, JetBlue, and Delta can get you from San Diego to London Heathrow Airport in just under 12h 55m. Your travel time can differ by up to 2h 50m. 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 $181, was found to be the cheapest airline from San Diego to London Heathrow Airport.Alternate airlines to your destination round-trip include Delta and Finnair. JetBlue is priced at 79% 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 $179 on JetBlue. Other airlines that offer cheap prices include WestJet from $361 and Iberia from $379 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 (74%), Alaska Airlines (74%) and British Airways (74%).

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

    The cheapest flight price from San Diego to London Heathrow Airport is $292. On average you can expect to pay $2,329. The most popular route, (San Diego - London Heathrow), can usually be booked for $601.

  • 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, December is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of $469). Flying from San Diego to London Heathrow Airport in June is currently the most expensive (average of $830). 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
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Wembley

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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$181Average$983FlexibilityNo cancel feeOn-time62%
DeltaCheapest$552Average$828FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$556Average$827FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$567Average$768FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$577Average$838FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$578Average$706FlexibilityNo cancel feeOn-time77%
IberiaCheapest$591Average$890FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$593Average$920FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$620Average$742FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$678Average$1,009FlexibilityNo cancel feeOn-time76%

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