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Cheap flights from London to San Francisco from $273

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Francisco departing on 9/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

 Logo
9:50 am - 6:07 pmLGW-SFO
16h 17m1 stop
 Logo
2:02 pm - 9:30 amSFO-LGW
35h 28m1 stop
lun., sep. 22 - vie., sep. 26
 Logo
10:55 am - 10:40 amLGW-SFO
31h 45m1 stop
 Logo
6:00 am - 9:30 amSFO-LGW
19h 30m1 stop
vie., ago. 29 - sáb., sep. 27
Scandinavian Airlines Logo
6:40 am - 3:35 pmLHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
4:40 pm - 4:00 pmSFO-LHR
15h 20m1 stop
$468Scandinavian Airlines
Find Deal
sáb., nov. 1 - sáb., nov. 8
Scandinavian Airlines Logo
10:20 am - 4:30 pmLHR-SFO
14h 10m1 stop
Scandinavian Airlines Logo
7:40 pm - 6:30 pmSFO-LHR
14h 50m1 stop
$470Scandinavian Airlines
Find Deal
jue., oct. 16 - mar., oct. 21
American Airlines Logo
12:20 pm - 2:27 pmLGW-SFO
34h 07m2 stops
American Airlines Logo
7:45 pm - 8:10 amSFO-LGW
52h 25m2 stops
$562American Airlines
Find Deal
lun., ago. 25 - lun., sep. 8
American Airlines Logo
3:05 pm - 11:59 pmLGW-SFO
16h 54m1 stop
American Airlines Logo
10:12 am - 8:10 amSFO-LGW
13h 58m1 stop
$570American Airlines
Find Deal
vie., sep. 19 - vie., oct. 10
Lufthansa Logo
8:45 am - 7:55 pmLCY-SFO
19h 10m1 stop
Lufthansa Logo
2:40 pm - 6:35 pmSFO-LCY
19h 55m1 stop
$595Lufthansa
Find Deal
mié., sep. 10 - mié., sep. 17
Lufthansa Logo
8:45 am - 4:00 pmLCY-SFO
15h 15m1 stop
Lufthansa Logo
6:50 pm - 4:30 pmSFO-LCY
13h 40m1 stop
$601Lufthansa
Find Deal
mié., oct. 8 - mié., nov. 5
Virgin Atlantic Logo
8:40 am - 7:57 pmLCY-SFO
19h 17m2 stops
Virgin Atlantic Logo
1:45 pm - 5:20 pmSFO-LCY
19h 35m1 stop
$609Virgin Atlantic
Find Deal
mié., sep. 3 - mar., sep. 23
Virgin Atlantic Logo
8:40 am - 7:57 pmLCY-SFO
19h 17m2 stops
Virgin Atlantic Logo
1:45 pm - 6:30 pmSFO-LCY
20h 45m1 stop
$611Virgin Atlantic
Find Deal
mié., sep. 3 - mar., sep. 23

SWISS flights from London to San Francisco

Our best SWISS deals on London to San Francisco flight tickets
SWISS
Nov 22
LHR8:55 amLondon Heathrow
15h 30m
1 stop
SFO4:25 pmSan Francisco
Nov 28
SFO7:25 pmSan Francisco
15h 50m
1 stop
LHR7:15 pmLondon Heathrow
SWISS
Sep 12
LHR6:00 amLondon Heathrow
18h 10m
1 stop
SFO4:10 pmSan Francisco
Sep 15
SFO7:40 pmSan Francisco
18h 05m
1 stop
LHR9:45 pmLondon Heathrow
SWISS
Sep 9
LCY9:25 amLondon City
14h 45m
1 stop
SFO4:10 pmSan Francisco
Nov 18
SFO7:25 pmSan Francisco
15h 15m
1 stop
LCY6:40 pmLondon City

TAP AIR PORTUGAL flights from London to San Francisco

Our best TAP AIR PORTUGAL deals on London to San Francisco flight tickets
TAP AIR PORTUGAL
Aug 24
LHR4:35 pmLondon Heathrow
29h 55m
1 stop
SFO2:30 pmSan Francisco
Sep 9
SFO6:45 pmSan Francisco
19h 15m
2 stops
LHR10:00 pmLondon Heathrow
TAP AIR PORTUGAL
Aug 24
LHR4:35 pmLondon Heathrow
29h 55m
1 stop
SFO2:30 pmSan Francisco
Sep 9
SFO6:45 pmSan Francisco
19h 15m
2 stops
LHR10:00 pmLondon Heathrow
TAP AIR PORTUGAL
Aug 24
LHR6:45 pmLondon Heathrow
27h 45m
1 stop
SFO2:30 pmSan Francisco
Sep 9
SFO6:45 pmSan Francisco
31h 35m
1 stop
LHR10:20 amLondon Heathrow

See travel insights to San Francisco from

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

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 San Francisco?

If you aren’t able to travel to San Francisco during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $586.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from London to San Francisco is on a Thursday when prices can be found for as low as $638. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $759.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest London to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $682. Flights in the afternoon are often more expensive with an average ticket price of $721.

What is the cheapest London to San Francisco flight route?

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

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $684 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from London for as low as $623 on momondo.

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

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

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

As of July 2025, prices for London to San Francisco flights are approximately 25% more expensive when compared to flights at the same time last year.

When to book flights from London to San Francisco

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

Cheap London to San Francisco (LON to SFO) flight deals and tips

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

Best Price Found

$273

Fastest flight time

13h 45m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from London in the past 72 hours is $273. The best round-trip flight deal from London to San Francisco found on momondo in the last 72 hours is $447.
The fastest flight from London to San Francisco takes 13h 45m
Direct flights go from London to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)

  • How far is London to San Francisco by plane?

    A flight from London to San Francisco will travel around 5349.7 mi. In terms of flight time, this usually takes a little over 14h 00m.

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

    Prices for flights from London to San Francisco Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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


Best airlines flying from London to San Francisco

Compare and see reviews for airlines that fly from London to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $509Free CancellationRating
6.6
7,093 reviews
Search British Airways flights
American AirlinesPriceFrom $544Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $545Free CancellationRating
6.8
7,207 reviews
Search Lufthansa flights
United AirlinesPriceFrom $545Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
Brussels AirlinesPriceFrom $546Free CancellationRating
7.3
352 reviews
Search Brussels Airlines flights
Virgin AtlanticPriceFrom $553Free CancellationRating
7.4
654 reviews
Search Virgin Atlantic flights
Scandinavian AirlinesPriceFrom $555Free CancellationRating
7.3
1,416 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $555Free CancellationRating
8.0
7,983 reviews
Search Delta flights
Austrian AirlinesPriceFrom $564Free CancellationRating
7.6
809 reviews
Search Austrian Airlines flights
IberiaPriceFrom $596Free CancellationRating
7.0
2,819 reviews
Search Iberia flights
  • Delta Flights From London to San Francisco

    Delta flies from London to San Francisco around 14 times per week, with 7,982 momondo users rating the airline 8.0/10. The cheapest Delta deal from London to San Francisco in the last 72 hours was $555 (round-trip), much lower than the average airfare cost of $708 for Delta flights on this route.

  • Austrian Airlines Flights From London to San Francisco

    $564 is the best Austrian Airlines flight deal from London to San Francisco found on momondo over the last 72 hours. The average Austrian Airlines ticket price found was closer to $727, however, with flight time and availability significantly affecting the price. Austrian Airlines (7.6/10 from 809 user reviews) flies into San Francisco from London 21 times in an average week so prices can vary.


Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Hayward
Calistoga
Sonoma
Bodega Bay
Roseville
Santa Clara
Daly City
Big Sur
Berkeley
Walnut Creek
South San Francisco
Fremont
Redwood City
Sunnyvale
Vallejo
Half Moon Bay
Pacific Grove

Why use momondo?

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

It is quick and easy to find London to San Francisco 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 San Francisco that suits you.

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

Yes. momondo enables you to select and highlight flights to San Francisco from London with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

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

If you are not ready to book a flight from London to San Francisco now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Francisco and let you know when they change.


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1 adult
mar. 7/8
mar. 7/15

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