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Cheap flights from London to San Francisco from £413

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Francisco departing on 30/8. 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 return flights

United Airlines Logo
08:45 - 16:10LHR-SFO
15h 25m1 stop
United Airlines Logo
11:40 - 09:35SFO-LHR
13h 55m1 stop
£413United Airlines
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Sat, 30 Aug - Mon, 15 Sep
United Airlines Logo
08:40 - 16:10LHR-SFO
15h 30m1 stop
United Airlines Logo
13:05 - 07:25SFO-LHR
10h 20mdirect
£414United Airlines
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Wed, 17 Sep - Sun, 21 Sep
British Airways Logo
10:45 - 13:50LHR-SFO
11h 05mdirect
British Airways Logo
16:30 - 10:55SFO-LHR
10h 25mdirect
£421British Airways
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Sun, 21 Sep - Tue, 30 Sep
British Airways Logo
14:15 - 17:25LHR-SFO
11h 10mdirect
British Airways Logo
16:30 - 10:55SFO-LHR
10h 25mdirect
£423British Airways
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Wed, 8 Oct - Sun, 12 Oct
Virgin Atlantic Logo
16:25 - 19:30LHR-SFO
11h 05mdirect
Virgin Atlantic Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
£425Virgin Atlantic
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Thu, 11 Sep - Thu, 18 Sep
Finnair Logo
19:05 - 16:07LHR-SFO
29h 02m2 stops
Finnair Logo
23:59 - 06:20SFO-LHR
22h 21m2 stops
£430Finnair
Find Deal
Sun, 7 Sep - Sun, 14 Sep
Finnair Logo
11:15 - 22:24LHR-SFO
19h 09m1 stop
Finnair Logo
23:59 - 06:20SFO-LHR
22h 21m2 stops
£431Finnair
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Sun, 7 Sep - Sun, 14 Sep
Lufthansa Logo
12:20 - 15:25LHR-SFO
11h 05mdirect
Lufthansa Logo
12:50 - 07:25SFO-LHR
10h 35mdirect
£431Lufthansa
Find Deal
Sun, 14 Sep - Sun, 9 Nov
Lufthansa Logo
07:25 - 14:30LHR-SFO
15h 05m1 stop
Lufthansa Logo
19:55 - 14:10SFO-LHR
10h 15mdirect
£433Lufthansa
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Wed, 10 Sep - Wed, 24 Sep
Virgin Atlantic Logo
11:15 - 14:15LHR-SFO
11h 00mdirect
Virgin Atlantic Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
£437Virgin Atlantic
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Sat, 30 Aug - Mon, 15 Sep

United Airlines flights from London to San Francisco

Our best United Airlines deals on London to San Francisco flight tickets
United Airlines
30 Aug
LHR08:45London Heathrow
15h 25m
1 stop
SFO16:10San Francisco
15 Sept
SFO11:40San Francisco
13h 55m
1 stop
LHR09:35London Heathrow
£413
Find similar
United Airlines
17 Sept
LHR08:40London Heathrow
15h 30m
1 stop
SFO16:10San Francisco
21 Sept
SFO13:05San Francisco
10h 20m
LHR07:25London Heathrow
£414
Find similar
United Airlines
9 Sept
LHR07:25London Heathrow
15h 05m
1 stop
SFO14:30San Francisco
16 Sept
SFO16:05San Francisco
10h 20m
LHR10:25London Heathrow
£415
Find similar

SWISS flights from London to San Francisco

Our best SWISS deals on London to San Francisco flight tickets
SWISS
17 Jan
LCY12:20London City
36h 10m
1 stop
SFO16:30San Francisco
24 Jan
SFO19:25San Francisco
13h 40m
1 stop
LCY17:05London City
£414
Find similar
SWISS
18 Sept
LCY09:25London City
14h 45m
1 stop
SFO16:10San Francisco
23 Sept
SFO19:30San Francisco
29h 20m
1 stop
LCY08:50London City
£417
Find similar
SWISS
10 Sept
LGW18:35London Gatwick
29h 35m
1 stop
SFO16:10San Francisco
23 Sept
SFO19:30San Francisco
14h 20m
1 stop
LGW17:50London Gatwick
£420
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London to San Francisco 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 279,928 searches. Data last updated 19 August 2025.
Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 30/8

08:45-16:10

1 stop15h 25m

San Francisco

Mon 15/9

11:40-09:35

1 stop13h 55m

£413

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 17/9

08:40-16:10

1 stop15h 30m

San Francisco

Sun 21/9

13:05-07:25

Nonstop10h 20m

£414

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 21/9

10:45-13:50

Nonstop11h 05m

San Francisco

Tue 30/9

16:30-10:55

Nonstop10h 25m

£421

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/10

14:15-17:25

Nonstop11h 10m

San Francisco

Sun 12/10

16:30-10:55

Nonstop10h 25m

£423

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 11/9

16:25-19:30

Nonstop11h 05m

San Francisco

Thu 18/9

21:20-15:40

Nonstop10h 20m

£425

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 7/9

19:05-16:07

2 stops29h 02m

San Francisco

Sun 14/9

23:59-06:20

2 stops22h 21m

£430

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 7/9

11:15-22:24

1 stop19h 09m

San Francisco

Sun 14/9

23:59-06:20

2 stops22h 21m

£431

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 14/9

12:20-15:25

Nonstop11h 05m

San Francisco

Sun 9/11

12:50-07:25

Nonstop10h 35m

£431

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 10/9

07:25-14:30

1 stop15h 05m

San Francisco

Wed 24/9

19:55-14:10

Nonstop10h 15m

£433

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 30/8

11:15-14:15

Nonstop11h 00m

San Francisco

Mon 15/9

21:20-15:40

Nonstop10h 20m

£437

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between London and San Francisco?

What is the cheapest month to fly to San Francisco?

The month of February is, on average, the cheapest month to fly to San Francisco from London, with most prices found around £424. If you are unable to visit San Francisco during the month of February, then departing from London during the month November is also very affordable. Most momondo users find prices during this month for around £435.

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

The cheapest day to depart on your flight to San Francisco is on a Tuesday when prices can be found for as low as £553. This is often the case because there is less demand to fly during this day of the week. Flights from London to San Francisco on a Sunday will generally be more expensive and average around £627. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to San Francisco is in the evening. Flights from London to San Francisco during this time can be as low as £475. Try not to purchase tickets at midday because they tend to be around £931. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £498 when searching weeks before you fly. 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 £454 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 August 2025, prices for London to San Francisco flights are approximately 59% 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 return 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

£422

Fastest flight time

11h 00m

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 £422. The best return flight deal from London to San Francisco found on momondo in the last 72 hours is £413.
The fastest flight from London to San Francisco takes 11h 00m
Direct flights go from London to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)
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  • How far is London to San Francisco by plane?

    A flight from London to San Francisco will travel around 5349.7 mi. 11h 00m is a normal flight duration for this route.

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

    Prices for flights from London to San Francisco Airport are updated daily.

  • 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 for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London to San Francisco Airport.

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

    The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted 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
DeltaPriceFrom £236Free CancellationRating
7.9
7,981 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom £344Free CancellationRating
7.4
1,470 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £346Free CancellationRating
7.1
1,956 reviews
Search TAP AIR PORTUGAL flights
SWISSPriceFrom £350Free CancellationRating
7.6
1,699 reviews
Search SWISS flights
Brussels AirlinesPriceFrom £357Free CancellationRating
7.3
350 reviews
Search Brussels Airlines flights
Air CanadaPriceFrom £357Free CancellationRating
7.1
9,997 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £360Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £363Free CancellationRating
6.7
7,283 reviews
Search British Airways flights
United AirlinesPriceFrom £363Free CancellationRating
7.4
8,922 reviews
Search United Airlines flights
FinnairPriceFrom £367Free CancellationRating
7.6
1,320 reviews
Search Finnair flights

  • Delta Flights From London to San Francisco

    The lowest priced Delta flight from London to San Francisco from the last 72 hours was £319. Generally, Delta has 14 flights on this route every week with an average price of £657. Delta is rated 7.9/10 by our users.

  • KLM Flights From London to San Francisco

    KLM is also a popular choice for this route. KLM flight deals for London to San Francisco start from as low as £498 round-trip, depending on your selected dates, with average KLM deals seen on momondo around £614. KLM operates 14 flights to San Francisco from London in an average week. Users have rated it 7.8/10 across 1,386 reviews.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Carmel-by-the-Sea
Santa Clara
Seaside
Vacaville
Salinas
Calistoga
Rohnert Park
Campbell
Sunnyvale
Milpitas
San Ramon
South San Francisco
Brentwood
Capitola
Sonoma
Millbrae
San Bruno
Sausalito
Woodland
Santa Cruz

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from London.

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

momondo does allow users to show only those flights to San Francisco from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to San Francisco.

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

Of course. momondo tracks the price of London to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your San Francisco trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
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