Cheap flights from San Francisco to London from $381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 10/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Multiple Airlines Logo
11:45 pm - 6:30 amSFO-LHR
22h 45m1 stop
Multiple Airlines Logo
8:40 am - 4:10 pmLHR-SFO
15h 30m1 stop
$524Multiple Airlines
Find Deal
Mon, Sep 29 - Wed, Oct 15
Scandinavian Airlines Logo
4:40 pm - 7:55 pmSFO-LHR
19h 15m2 stops
Scandinavian Airlines Logo
7:30 pm - 11:53 pmLHR-SFO
36h 23m2 stops
$526Scandinavian Airlines
Find Deal
Sat, Nov 8 - Mon, Nov 10
Scandinavian Airlines Logo
7:05 am - 9:35 amSFO-LHR
18h 30m2 stops
Scandinavian Airlines Logo
10:20 am - 7:25 pmLHR-SFO
16h 05m1 stop
$529Scandinavian Airlines
Find Deal
Tue, Oct 21 - Thu, Oct 30
Multiple Airlines Logo
4:35 pm - 1:20 pmSFO-LHR
12h 45m1 stop
Multiple Airlines Logo
11:10 am - 8:35 pmLHR-SFO
16h 25m1 stop
$531Multiple Airlines
Find Deal
Sun, Oct 12 - Tue, Oct 28
Air Canada Logo
11:40 am - 9:35 amSFO-LHR
13h 55m1 stop
Air Canada Logo
6:50 am - 7:51 pmLHR-SFO
21h 01m2 stops
$540Air Canada
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Sun, Sep 28 - Tue, Oct 14
United Airlines Logo
4:05 pm - 10:25 amSFO-LHR
10h 20mnonstop
United Airlines Logo
6:55 am - 2:30 pmLHR-SFO
15h 35m1 stop
$541United Airlines
Find Deal
Sun, Sep 28 - Tue, Oct 14
United Airlines Logo
5:25 pm - 12:00 pmSFO-LHR
10h 35mnonstop
United Airlines Logo
9:00 am - 4:30 pmLHR-SFO
15h 30m1 stop
$559United Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
Virgin Atlantic Logo
4:05 pm - 10:25 amSFO-LHR
10h 20mnonstop
Virgin Atlantic Logo
6:30 am - 11:45 amLHR-SFO
13h 15m1 stop
$562Virgin Atlantic
Find Deal
Sun, Sep 28 - Tue, Oct 14
Virgin Atlantic Logo
9:20 pm - 3:40 pmSFO-LHR
10h 20mnonstop
Virgin Atlantic Logo
6:30 am - 11:45 amLHR-SFO
13h 15m1 stop
$565Virgin Atlantic
Find Deal
Sun, Sep 28 - Tue, Oct 14
Lufthansa Logo
9:05 pm - 8:45 pmSFO-LHR
15h 40m1 stop
Lufthansa Logo
10:50 am - 7:00 pmLHR-SFO
16h 10m1 stop
$575Lufthansa
Find Deal
Sun, Oct 12 - Wed, Oct 22

Scandinavian Airlines flights from San Francisco to London Heathrow Airport

Our best Scandinavian Airlines deals on San Francisco to London Heathrow Airport flight tickets
Scandinavian Airlines
Nov 8
SFO4:40 pmSan Francisco
19h 15m
2 stops
LHR7:55 pmLondon Heathrow
Nov 10
LHR7:30 pmLondon Heathrow
36h 23m
2 stops
SFO11:53 pmSan Francisco
Scandinavian Airlines
Oct 21
SFO7:05 amSan Francisco
18h 30m
2 stops
LHR9:35 amLondon Heathrow
Oct 30
LHR10:20 amLondon Heathrow
16h 05m
1 stop
SFO7:25 pmSan Francisco
Scandinavian Airlines
Oct 21
SFO7:05 amSan Francisco
18h 30m
2 stops
LHR9:35 amLondon Heathrow
Oct 30
LHR7:05 amLondon Heathrow
19h 20m
2 stops
SFO7:25 pmSan Francisco

Air Canada flights from San Francisco to London Heathrow Airport

Our best Air Canada deals on San Francisco to London Heathrow Airport flight tickets
Air Canada
Sep 28
SFO11:40 amSan Francisco
13h 55m
1 stop
LHR9:35 amLondon Heathrow
Oct 14
LHR6:50 amLondon Heathrow
21h 01m
2 stops
SFO7:51 pmSan Francisco
Air Canada
Sep 22
SFO11:45 pmSan Francisco
25h 50m
1 stop
LHR9:35 amLondon Heathrow
Oct 7
LHR2:10 pmLondon Heathrow
28h 18m
1 stop
SFO10:28 amSan Francisco

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to London Heathrow Airport 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, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 9/29

11:45 pm-6:30 am

1 stop22h 45m

London Heathrow

Wed 10/15

8:40 am-4:10 pm

1 stop15h 30m

$524

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 11/8

4:40 pm-7:55 pm

2 stops19h 15m

London Heathrow

Mon 11/10

7:30 pm-11:53 pm

2 stops36h 23m

$526

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 10/21

7:05 am-9:35 am

2 stops18h 30m

London Heathrow

Thu 10/30

10:20 am-7:25 pm

1 stop16h 05m

$529

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 10/12

4:35 pm-1:20 pm

1 stop12h 45m

London Heathrow

Tue 10/28

11:10 am-8:35 pm

1 stop16h 25m

$531

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 9/28

11:40 am-9:35 am

1 stop13h 55m

London Heathrow

Tue 10/14

6:50 am-7:51 pm

2 stops21h 01m

$540

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 9/28

4:05 pm-10:25 am

Nonstop10h 20m

London Heathrow

Tue 10/14

6:55 am-2:30 pm

1 stop15h 35m

$541

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Fri 11/14

5:25 pm-12:00 pm

Nonstop10h 35m

London Heathrow

Sun 11/16

9:00 am-4:30 pm

1 stop15h 30m

$559

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 9/28

4:05 pm-10:25 am

Nonstop10h 20m

London Heathrow

Tue 10/14

6:30 am-11:45 am

1 stop13h 15m

$562

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 9/28

9:20 pm-3:40 pm

Nonstop10h 20m

London Heathrow

Tue 10/14

6:30 am-11:45 am

1 stop13h 15m

$565

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 10/12

9:05 pm-8:45 pm

1 stop15h 40m

London Heathrow

Wed 10/22

10:50 am-7:00 pm

1 stop16h 10m

$575

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from San Francisco to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from San Francisco, with most prices found around $649. If you’re not able to fly to London Heathrow Airport in October, then February is your next best option. Flight prices from San Francisco to London Heathrow Airport during February average around $670.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $807. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $943.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from San Francisco to London Heathrow Airport in the evening for as low as $853. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $977.

What is the cheapest San Francisco to London Heathrow flight route?

Fly from San Francisco to London Heathrow for the best San Francisco - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $767 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Francisco for as low as $706 on momondo.

What cabin class options are available on San Francisco to London Heathrow flights?

There are 4 cabin classes available to choose from on San Francisco to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Francisco to London Heathrow Airport flights?

You could potentially save up to 4% on your flight if you consider stops on a San Francisco to London Heathrow Airport flight.

How have San Francisco to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for San Francisco to London Heathrow Airport flights are approximately 55% more expensive when compared to flights at the same time last year.

When to book flights from San Francisco to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to London Heathrow Airport (SFO to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to London Heathrow Airport

Best Price Found

$389

Fastest flight time

10h 10m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from San Francisco in the past 72 hours is $389. The best round-trip flight deal from San Francisco to London Heathrow Airport found on momondo in the last 72 hours is $655.
The fastest flight from San Francisco to London Heathrow Airport takes 10h 10m
Direct flights go from San Francisco to London Heathrow Airport every day.
  • How far is San Francisco to London Heathrow by plane?

    London Heathrow is 5341.3 mi away from San Francisco. Typically, this will take 10h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from San Francisco Airport to London Heathrow Airport?

    Prices for flights from San Francisco Airport to London Heathrow Airport refresh daily.

  • How many operators does momondo search for flights from San Francisco Airport to London Heathrow Airport?

  • How old do you have to be to fly from San Francisco Airport to London Heathrow Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from San Francisco to London Heathrow Airport?

  • What is the most popular airline from San Francisco to London Heathrow Airport?

Best airlines flying from San Francisco to London Heathrow Airport

Compare and see reviews for airlines that fly from San Francisco to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $195Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
Scandinavian AirlinesPriceFrom $334Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom $433Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
SWISSPriceFrom $541Free CancellationRating
7.6
1,737 reviews
Search SWISS flights
British AirwaysPriceFrom $544Free CancellationRating
6.7
7,367 reviews
Search British Airways flights
DeltaPriceFrom $564Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $570Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
LufthansaPriceFrom $571Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
IberiaPriceFrom $572Free CancellationRating
7.0
2,925 reviews
Search Iberia flights
FinnairPriceFrom $573Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
  • Delta Flights From San Francisco to London Heathrow Airport

    Delta flight deals from San Francisco to London Heathrow Airport start from $564 round-trip. Over the 14 Delta flights for this route in a normal week, average airfare is usually $832 round-trip - but some users have found much cheaper deals with momondo.

  • KLM Flights From San Francisco to London Heathrow Airport

    KLM (7.8/10 from 1,386 reviews) operates around 14 flights from San Francisco to London Heathrow Airport in any given week. The average KLM airfare for this route is around $1,037, with deals from around $725 rare but found on momondo. Referenced prices are for round-trip San Francisco to London Heathrow Airport flight searches in the last 72 hours.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Salisbury
Brentwood
Ilford
Folkestone
Colchester
Swindon
Stratford-upon-Avon
Watford

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to London?

It is quick and easy to find San Francisco to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Francisco to London with flexible booking policies on momondo?

Flights from San Francisco to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Francisco to London?

momondo helps you find the best flight between San Francisco and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Francisco to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Francisco to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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1 adult
Fri 10/17
Fri 10/24

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