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Cheap flights from San Francisco to London from $242

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 8/4. 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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Cheap round-trip flights

TAP AIR PORTUGAL Logo
4:20 pm - 10:55 pmSFO-LHR
22h 35m1 stop
TAP AIR PORTUGAL Logo
1:45 pm - 2:30 pmLHR-SFO
32h 45m1 stop
$407TAP AIR PORTUGAL
Find Deal
Thu, Aug 21 - Wed, Aug 27
TAP AIR PORTUGAL Logo
4:20 pm - 10:55 pmSFO-LHR
22h 35m1 stop
TAP AIR PORTUGAL Logo
1:45 pm - 2:30 pmLHR-SFO
32h 45m1 stop
$421TAP AIR PORTUGAL
Find Deal
Thu, Sep 18 - Wed, Oct 8
TAP AIR PORTUGAL Logo
4:35 pm - 6:55 pmSFO-LHR
18h 20m1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 4:05 pmLHR-SFO
29h 35m1 stop
$422TAP AIR PORTUGAL
Find Deal
Wed, Dec 3 - Thu, Dec 11
TAP AIR PORTUGAL Logo
4:20 pm - 10:55 pmSFO-LHR
22h 35m1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 4:05 pmLHR-SFO
29h 35m1 stop
$424TAP AIR PORTUGAL
Find Deal
Thu, Oct 23 - Thu, Nov 6
 Logo
11:40 am - 6:30 amSFO-LHR
34h 50m1 stop
 Logo
8:40 am - 4:10 pmLHR-SFO
15h 30m1 stop
Mon, Aug 18 - Fri, Aug 29
 Logo
11:40 am - 9:35 amSFO-LHR
13h 55m1 stop
 Logo
5:10 pm - 5:25 pmLHR-SFO
31h 15m1 stop
Mon, Oct 20 - Wed, Oct 29
Scandinavian Airlines Logo
7:40 pm - 8:55 amSFO-LHR
29h 15m2 stops
Scandinavian Airlines Logo
6:40 am - 4:30 pmLHR-SFO
17h 50m1 stop
$476Scandinavian Airlines
Find Deal
Sun, Aug 24 - Wed, Aug 27
Virgin Atlantic Logo
1:45 pm - 2:15 pmSFO-LHR
16h 30m1 stop
Virgin Atlantic Logo
6:15 am - 12:50 pmLHR-SFO
14h 35m1 stop
$484Virgin Atlantic
Find Deal
Sun, Aug 3 - Tue, Aug 19
Scandinavian Airlines Logo
9:30 pm - 4:00 pmSFO-LHR
35h 30m1 stop
Scandinavian Airlines Logo
9:55 am - 7:25 pmLHR-SFO
40h 30m2 stops
$488Scandinavian Airlines
Find Deal
Sun, Oct 26 - Wed, Oct 29
Virgin Atlantic Logo
9:20 pm - 3:40 pmSFO-LHR
10h 20mnonstop
Virgin Atlantic Logo
6:15 am - 12:50 pmLHR-SFO
14h 35m1 stop
$489Virgin Atlantic
Find Deal
Sun, Aug 3 - Tue, Aug 19

TAP AIR PORTUGAL flights from San Francisco to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on San Francisco to London Heathrow Airport flight tickets
TAP AIR PORTUGAL
Aug 21
SFO4:20 pmSan Francisco
22h 35m
1 stop
LHR10:55 pmLondon Heathrow
Aug 27
LHR1:45 pmLondon Heathrow
32h 45m
1 stop
SFO2:30 pmSan Francisco
TAP AIR PORTUGAL
Sep 18
SFO4:20 pmSan Francisco
22h 35m
1 stop
LHR10:55 pmLondon Heathrow
Oct 8
LHR1:45 pmLondon Heathrow
32h 45m
1 stop
SFO2:30 pmSan Francisco
TAP AIR PORTUGAL
Dec 3
SFO4:35 pmSan Francisco
18h 20m
1 stop
LHR6:55 pmLondon Heathrow
Dec 11
LHR6:30 pmLondon Heathrow
29h 35m
1 stop
SFO4:05 pmSan Francisco

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
Aug 24
SFO7:40 pmSan Francisco
29h 15m
2 stops
LHR8:55 amLondon Heathrow
Aug 27
LHR6:40 amLondon Heathrow
17h 50m
1 stop
SFO4:30 pmSan Francisco
Scandinavian Airlines
Oct 26
SFO9:30 pmSan Francisco
35h 30m
1 stop
LHR4:00 pmLondon Heathrow
Oct 29
LHR9:55 amLondon Heathrow
40h 30m
2 stops
SFO7:25 pmSan Francisco

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 $637. 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 $668.

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 $813. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $947.

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 $855. 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 $990.

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 $775 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 $725 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.

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

As of July 2025, prices for San Francisco to London Heathrow Airport flights are approximately 18% cheaper 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

$242

Fastest flight time

10h 20m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from San Francisco in the past 72 hours is $242. The best round-trip flight deal from San Francisco to London Heathrow Airport found on momondo in the last 72 hours is $407.
The fastest flight from San Francisco to London Heathrow Airport takes 10h 20m
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
Scandinavian AirlinesPriceFrom $334Free CancellationRating
7.3
1,416 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom $487Free CancellationRating
7.1
1,908 reviews
Search TAP AIR PORTUGAL flights
SWISSPriceFrom $555Free CancellationRating
7.5
1,654 reviews
Search SWISS flights
IberiaPriceFrom $572Free CancellationRating
7.0
2,820 reviews
Search Iberia flights
FinnairPriceFrom $573Free CancellationRating
7.6
1,306 reviews
Search Finnair flights
American AirlinesPriceFrom $580Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
JetBluePriceFrom $584Free CancellationRating
7.3
2,916 reviews
Search JetBlue flights
British AirwaysPriceFrom $586Free CancellationRating
6.6
7,093 reviews
Search British Airways flights
KLMPriceFrom $586Free CancellationRating
7.8
1,367 reviews
Search KLM flights
LufthansaPriceFrom $588Free CancellationRating
6.8
7,207 reviews
Search Lufthansa flights
  • Delta Flights From San Francisco to London Heathrow Airport

    Delta flight deals from San Francisco to London Heathrow Airport start from $593 round-trip. Over the 11 Delta flights for this route in a normal week, average airfare is usually $808 round-trip - but some users have found much cheaper deals with momondo.

  • Alaska Airlines Flights From San Francisco to London Heathrow Airport

    Alaska Airlines (8.0/10 from 10,000 reviews) operates around 14 flights from San Francisco to London Heathrow Airport in any given week. The average Alaska Airlines airfare for this route is around $936, with deals from around $789 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
Croydon
Luton
Slough
Dover
Dartford
Guildford
Stansted
Hayes
Milton Keynes
Salisbury
Swindon
Ilford
Colchester
Stratford-upon-Avon
Chelmsford
Canterbury
Watford
Richmond

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
Tue 7/8
Tue 7/15

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