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Cheap flights from London to San Francisco from C$ 684

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 8/5. 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.
United Airlines Logo
12:40 p.m. - 7:05 a.m.
LHR
-
SFO
26h 25m2 stops
United Airlines Logo
12:00 p.m. - 10:10 a.m.
SFO
-
LHR
14h 10m1 stop
C$ 849United Airlines
Mon, 25 May - Mon, 1 Jun
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$ 851Scandinavian Airlines
Thu, 15 Jan - Mon, 19 Jan
Finnair Logo
10:45 a.m. - 1:50 p.m.
LHR
-
SFO
11h 05mdirect
Finnair Logo
4:35 p.m. - 11:00 a.m.
SFO
-
LHR
10h 25mdirect
C$ 852Finnair
Tue, 9 Jun - Tue, 30 Jun
British Airways Logo
6:20 a.m. - 3:45 p.m.
LHR
-
SFO
17h 25m1 stop
British Airways Logo
4:23 p.m. - 3:05 p.m.
SFO
-
LHR
14h 42m1 stop
C$ 855British Airways
Sun, 14 Jun - Tue, 30 Jun
Finnair Logo
12:55 p.m. - 6:16 p.m.
LHR
-
SFO
37h 21m1 stop
Finnair Logo
4:35 p.m. - 11:00 a.m.
SFO
-
LHR
10h 25mdirect
C$ 860Finnair
Tue, 26 May - Tue, 2 Jun
British Airways Logo
10:45 a.m. - 1:50 p.m.
LHR
-
SFO
11h 05mdirect
British Airways Logo
4:35 p.m. - 11:00 a.m.
SFO
-
LHR
10h 25mdirect
C$ 863British Airways
Mon, 8 Jun - Sat, 27 Jun
Scandinavian Airlines Logo
5:30 p.m. - 2:35 p.m.
LHR
-
SFO
29h 05m2 stops
Scandinavian Airlines Logo
4:40 p.m. - 6:50 p.m.
SFO
-
LHR
18h 10m2 stops
C$ 866Scandinavian Airlines
Sat, 14 Feb - Sat, 21 Feb
British Airways Logo
10:45 a.m. - 1:50 p.m.
LHR
-
SFO
11h 05mdirect
British Airways Logo
4:23 p.m. - 3:05 p.m.
SFO
-
LHR
14h 42m1 stop
C$ 870British Airways
Fri, 22 May - Sat, 30 May
British Airways Logo
10:45 a.m. - 1:50 p.m.
LHR
-
SFO
11h 05mdirect
British Airways Logo
7:30 p.m. - 1:55 p.m.
SFO
-
LHR
10h 25mdirect
C$ 873British Airways
Thu, 11 Jun - Mon, 29 Jun
British Airways Logo
11:45 a.m. - 4:00 p.m.
LHR
-
SFO
11h 15mdirect
British Airways Logo
2:28 p.m. - 12:10 p.m.
SFO
-
LHR
13h 42m1 stop
C$ 877British Airways
Thu, 26 Mar - Thu, 2 Apr

Finnair flights from London to San Francisco

Our best Finnair deals on London to San Francisco flight tickets
Finnair
9 Jun
LHR10:45 a.m.London Heathrow
11h 05m
SFO1:50 p.m.San Francisco
30 Jun
SFO4:35 p.m.San Francisco
10h 25m
LHR11:00 a.m.London Heathrow
C$ 852
Find similar
Finnair
26 May
LHR12:55 p.m.London Heathrow
37h 21m
1 stop
SFO6:16 p.m.San Francisco
2 Jun
SFO4:35 p.m.San Francisco
10h 25m
LHR11:00 a.m.London Heathrow
C$ 860
Find similar
Finnair
8 Jun
LHR10:45 a.m.London Heathrow
11h 05m
SFO1:50 p.m.San Francisco
30 Jun
SFO4:35 p.m.San Francisco
10h 25m
LHR11:00 a.m.London Heathrow
C$ 882
Find similar

British Airways flights from London to San Francisco

Our best British Airways deals on London to San Francisco flight tickets
British Airways
14 Jun
LHR6:20 a.m.London Heathrow
17h 25m
1 stop
SFO3:45 p.m.San Francisco
30 Jun
SFO4:23 p.m.San Francisco
14h 42m
1 stop
LHR3:05 p.m.London Heathrow
C$ 855
Find similar
British Airways
8 Jun
LHR10:45 a.m.London Heathrow
11h 05m
SFO1:50 p.m.San Francisco
27 Jun
SFO4:35 p.m.San Francisco
10h 25m
LHR11:00 a.m.London Heathrow
C$ 863
Find similar
British Airways
22 May
LHR10:45 a.m.London Heathrow
11h 05m
SFO1:50 p.m.San Francisco
30 May
SFO4:23 p.m.San Francisco
14h 42m
1 stop
LHR3:05 p.m.London Heathrow
C$ 870
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 22 December 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

Mon 25/5

12:40 p.m.-7:05 a.m.

2 stops26h 25m

San Francisco

Mon 1/6

12:00 p.m.-10:10 a.m.

1 stop14h 10m

C$ 849

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 15/1

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

2 stops31h 00m

San Francisco

Mon 19/1

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

2 stops18h 10m

C$ 851

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 9/6

10:45 a.m.-1:50 p.m.

Nonstop11h 05m

San Francisco

Tue 30/6

4:35 p.m.-11:00 a.m.

Nonstop10h 25m

C$ 852

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 14/6

6:20 a.m.-3:45 p.m.

1 stop17h 25m

San Francisco

Tue 30/6

4:23 p.m.-3:05 p.m.

1 stop14h 42m

C$ 855

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 26/5

12:55 p.m.-6:16 p.m.

1 stop37h 21m

San Francisco

Tue 2/6

4:35 p.m.-11:00 a.m.

Nonstop10h 25m

C$ 860

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 8/6

10:45 a.m.-1:50 p.m.

Nonstop11h 05m

San Francisco

Sat 27/6

4:35 p.m.-11:00 a.m.

Nonstop10h 25m

C$ 863

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 14/2

5:30 p.m.-2:35 p.m.

2 stops29h 05m

San Francisco

Sat 21/2

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

2 stops18h 10m

C$ 866

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 22/5

10:45 a.m.-1:50 p.m.

Nonstop11h 05m

San Francisco

Sat 30/5

4:23 p.m.-3:05 p.m.

1 stop14h 42m

C$ 870

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 11/6

10:45 a.m.-1:50 p.m.

Nonstop11h 05m

San Francisco

Mon 29/6

7:30 p.m.-1:55 p.m.

Nonstop10h 25m

C$ 873

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 26/3

11:45 a.m.-4:00 p.m.

Nonstop11h 15m

San Francisco

Thu 2/4

2:28 p.m.-12:10 p.m.

1 stop13h 42m

C$ 877

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$ 789, 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$ 796.

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$ 800. On the other hand, Monday 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$ 1,862.

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

Flying to San Francisco from London in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as C$ 982 when looking at flights departing in the afternoon. In contrast, the most expensive time of day to depart to San Francisco is at noon when prices are around C$ 2,171.

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$ 939 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$ 882 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?

No. A direct flight is the cheapest option for a flight between London to San Francisco.

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

As of December 2025, prices for London to San Francisco flights are approximately 3% 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$ 2,959

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$ 2,959. The best round-trip flight deal from London to San Francisco found on momondo in the last 72 hours is C$ 1,655.
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 in San Francisco. From London there are direct flights to San Francisco (SFO).
Search flight deals

  • 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 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?

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
Milpitas
Carmel-by-the-Sea
Turlock
South San Francisco
Palo Alto
Burlingame
Cupertino
Mill Valley
Morgan Hill
Los Banos
Pacifica
Mountain View
Woodland
Roseville

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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