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Cheap flights from London to San Francisco from C$ 703

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 17/1. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
6:40 a.m. - 2:35 p.m.LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
4:40 p.m. - 6:50 p.m.SFO-LHR
18h 10m2 stops
C$ 803Scandinavian Airlines
Find Deal
Sat, 6 Dec - Mon, 12 Jan
Scandinavian Airlines Logo
6:40 a.m. - 2:35 p.m.LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
4:40 p.m. - 6:50 p.m.SFO-LHR
18h 10m2 stops
C$ 804Scandinavian Airlines
Find Deal
Sat, 6 Dec - Mon, 12 Jan
Scandinavian Airlines Logo
7:50 p.m. - 2:35 p.m.LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
4:40 p.m. - 6:30 p.m.SFO-LHR
17h 50m2 stops
C$ 807Scandinavian Airlines
Find Deal
Fri, 23 Jan - Fri, 6 Feb
Scandinavian Airlines Logo
3:35 p.m. - 2:35 p.m.LHR-SFO
31h 00m2 stops
Scandinavian Airlines Logo
4:40 p.m. - 6:50 p.m.SFO-LHR
18h 10m2 stops
C$ 808Scandinavian Airlines
Find Deal
Sat, 6 Dec - Mon, 12 Jan
Scandinavian Airlines Logo
9:05 p.m. - 2:35 p.m.LHR-SFO
25h 30m2 stops
Scandinavian Airlines Logo
4:40 p.m. - 6:50 p.m.SFO-LHR
18h 10m2 stops
C$ 814Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
6:40 a.m. - 2:35 p.m.LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
4:40 p.m. - 4:00 p.m.SFO-LHR
15h 20m1 stop
C$ 815Scandinavian Airlines
Find Deal
Sat, 6 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
6:40 a.m. - 2:35 p.m.LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
4:40 p.m. - 6:30 p.m.SFO-LHR
17h 50m1 stop
C$ 817Scandinavian Airlines
Find Deal
Thu, 4 Dec - Sun, 11 Jan
Scandinavian Airlines Logo
9:05 p.m. - 3:35 p.m.LHR-SFO
25h 30m2 stops
Scandinavian Airlines Logo
5:40 p.m. - 5:00 p.m.SFO-LHR
16h 20m2 stops
C$ 818Scandinavian Airlines
Find Deal
Fri, 13 Mar - Sat, 21 Mar
Virgin Atlantic Logo
8:55 p.m. - 11:45 a.m.LHR-SFO
22h 50m1 stop
Virgin Atlantic Logo
1:59 p.m. - 2:15 p.m.SFO-LHR
16h 16m1 stop
C$ 828Virgin Atlantic
Find Deal
Tue, 31 Mar - Sun, 12 Apr
Scandinavian Airlines Logo
7:50 p.m. - 2:35 p.m.LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
5:40 p.m. - 6:50 p.m.SFO-LHR
18h 10m2 stops
C$ 835Scandinavian Airlines
Find Deal
Mon, 2 Mar - Tue, 10 Mar

Scandinavian Airlines flights from London to San Francisco

Our best Scandinavian Airlines deals on London to San Francisco flight tickets
Scandinavian Airlines
21 Feb
LHR6:40 a.m.London Heathrow
15h 55m
1 stop
SFO2:35 p.m.San Francisco
1 Mar
SFO4:40 p.m.San Francisco
17h 00m
1 stop
LHR5:40 p.m.London Heathrow
C$ 799
Find similar
Scandinavian Airlines
28 Jan
LHR7:30 p.m.London Heathrow
27h 05m
1 stop
SFO2:35 p.m.San Francisco
9 Feb
SFO4:40 p.m.San Francisco
15h 45m
2 stops
LHR4:25 p.m.London Heathrow
C$ 801
Find similar
Scandinavian Airlines
6 Dec
LHR6:40 a.m.London Heathrow
15h 55m
1 stop
SFO2:35 p.m.San Francisco
12 Jan
SFO4:40 p.m.San Francisco
18h 10m
2 stops
LHR6:50 p.m.London Heathrow
C$ 803
Find similar

Delta flights from London to San Francisco

Our best Delta deals on London to San Francisco flight tickets
Delta
24 Mar
LHR6:30 a.m.London Heathrow
13h 20m
1 stop
SFO12:50 p.m.San Francisco
3 Apr
SFO3:00 p.m.San Francisco
14h 10m
1 stop
LHR1:10 p.m.London Heathrow
C$ 871
Find similar
Delta
12 Dec
LHR6:30 a.m.London Heathrow
13h 20m
1 stop
SFO11:50 a.m.San Francisco
24 Dec
SFO12:10 a.m.San Francisco
22h 55m
1 stop
LHR7:05 a.m.London Heathrow
C$ 874
Find similar
Delta
12 Dec
LHR6:30 a.m.London Heathrow
13h 20m
1 stop
SFO11:50 a.m.San Francisco
27 Dec
SFO5:55 a.m.San Francisco
17h 10m
1 stop
LHR7:05 a.m.London Heathrow
C$ 878
Find similar

momondo Fare Finder

 
Customize 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 96,600 searches. Data last updated 13 November 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 6/12

6:40 a.m.-2:35 p.m.

1 stop15h 55m

San Francisco

Mon 12/1

4:40 p.m.-6:50 p.m.

2 stops18h 10m

C$ 803

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 6/12

6:40 a.m.-2:35 p.m.

1 stop15h 55m

San Francisco

Mon 12/1

4:40 p.m.-6:50 p.m.

2 stops18h 10m

C$ 804

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 23/1

7:50 p.m.-2:35 p.m.

2 stops26h 45m

San Francisco

Fri 6/2

4:40 p.m.-6:30 p.m.

2 stops17h 50m

C$ 807

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 6/12

3:35 p.m.-2:35 p.m.

2 stops31h 00m

San Francisco

Mon 12/1

4:40 p.m.-6:50 p.m.

2 stops18h 10m

C$ 808

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 4/12

9:05 p.m.-2:35 p.m.

2 stops25h 30m

San Francisco

Mon 8/12

4:40 p.m.-6:50 p.m.

2 stops18h 10m

C$ 814

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 6/12

6:40 a.m.-2:35 p.m.

1 stop15h 55m

San Francisco

Mon 8/12

4:40 p.m.-4:00 p.m.

1 stop15h 20m

C$ 815

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 4/12

6:40 a.m.-2:35 p.m.

1 stop15h 55m

San Francisco

Sun 11/1

4:40 p.m.-6:30 p.m.

1 stop17h 50m

C$ 817

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 13/3

9:05 p.m.-3:35 p.m.

2 stops25h 30m

San Francisco

Sat 21/3

5:40 p.m.-5:00 p.m.

2 stops16h 20m

C$ 818

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 31/3

8:55 p.m.-11:45 a.m.

1 stop22h 50m

San Francisco

Sun 12/4

1:59 p.m.-2:15 p.m.

1 stop16h 16m

C$ 828

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/3

7:50 p.m.-2:35 p.m.

2 stops26h 45m

San Francisco

Tue 10/3

5:40 p.m.-6:50 p.m.

2 stops18h 10m

C$ 835

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 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 cheapest month to fly to San Francisco from London is in September. Flight prices, which tend to average around C$ 804, are often lower during this time because this is during the off-season. The month of February is another great option to travel to San Francisco, with average flight prices from London averaging around C$ 811.

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. Travellers who choose to depart for San Francisco on a Thursday will often find tickets for as low as C$ 814. On the other hand, Saturday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,891.

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

Flying to San Francisco from London at noon is the least expensive time of day to depart. momondo users have found prices as low as C$ 894 when looking at flights departing at noon. In contrast, the most expensive time of day to depart to San Francisco is in the morning when prices are around C$ 1,159.

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 C$ 949 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 C$ 880 on momondo.

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

There are 2 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.

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

You could potentially save up to 1% on your flight if you consider stops on a London to San Francisco flight.

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

As of November 2025, prices for London to San Francisco flights are approximately 11% 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

C$ 622

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 C$ 622. The best round-trip flight deal from London to San Francisco found on momondo in the last 72 hours is C$ 1,489.
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?

    The distance between London and San Francisco is about 8609.4 km. Flights usually cover this in 11h 00m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from London to San Francisco Airport refresh 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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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 required for your trip to San Francisco Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model 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
United AirlinesPriceFrom C$ 891Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights

  • United Airlines Flights From London to San Francisco

    United Airlines flight deals from London to San Francisco start from C$ 891 round-trip. Over the 14 United Airlines flights for this route in a normal week, average airfare is usually C$ 891 round-trip - but some users have found much cheaper deals with momondo.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
San Mateo
Belmont
Los Altos
San Bruno
Santa Cruz
Newark
Fremont
Carmel-by-the-Sea
Turlock
South San Francisco
Palo Alto
Cupertino
Mill Valley
Morgan Hill
Los Banos
Mountain View
Pacifica
Woodland
Roseville
Berkeley

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?

Yes. momondo allows you to filter the results for London to San Francisco flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between London and San Francisco 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 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

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