What is the cheapest airline that flies from London to San Francisco?

TAP AIR PORTUGAL, United Airlines, and SWISS are the most popular carriers operating from London to San Francisco

What airlines fly to San Francisco?

British Airways, United Airlines and Lufthansa are the top three most popular airlines that fly to San Francisco from London according to our data. British Airways is the first choice among our users, with 41% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 12 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

How many flights depart from London to San Francisco on average per week?

As of December 2025, 217 flights take off from London and land in San Francisco each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

What is the most punctual flight time for London to San Francisco flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Which layover airport has the shortest connection time from London to San Francisco?

Copenhagen (CPH) has the shortest average layover time for this route: 2h 04m.

Which airline has the best punctuality record on London to San Francisco flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

Which layover airport offers the lowest fares from London to San Francisco?

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $577.

Which layover airport has the shortest travel time from London to San Francisco?

Flights connecting via Copenhagen (CPH) have the shortest average one-way travel time: 14h 45m.

How many flights depart from London to San Francisco on average per day?

The number of flights available between London and San Francisco is 31 per day as of December 2025. The most frequent departure time is 11:00AM, with 58% of daily flights leaving at noon.

Which airport is the most popular layover for flights between London and San Francisco?

Copenhagen (CPH) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

How often are flights from London to San Francisco delayed?

Historically, on average around 13% of flights between London and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 140 minutes.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

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?

There are 12 operators available for flights from London to San Francisco Airport as of December 2025.

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.

$482 Cheap Flights from London to San Francisco in 2025/26

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9:00 am - 9:22 pm

LHR

SFO

20h 22m2 stops

1:20 pm - 11:50 am

SFO

LHR

14h 30m1 stop

$625Air Canada

mié., feb. 4 - mié., feb. 18

7:40 am - 7:35 pm

LHR

SFO

19h 55m1 stop

5:25 pm - 12:00 pm

SFO

LHR

10h 35mnonstop

$626United Airlines

lun., ene. 19 - jue., ene. 29

1:35 pm - 11:00 pm

LHR

SFO

17h 25m1 stop

12:50 pm - 7:25 am

SFO

LHR

10h 35mnonstop

$627Lufthansa

lun., ene. 12 - lun., ene. 26

6:40 pm - 4:30 pm

LGW

SFO

29h 50m1 stop

7:25 pm - 5:50 pm

SFO

LGW

14h 25m1 stop

$627SWISS

lun., ene. 12 - lun., ene. 26

6:40 pm - 4:30 pm

LGW

SFO

29h 50m1 stop

7:25 pm - 5:50 pm

SFO

LGW

14h 25m1 stop

$628SWISS

dom., feb. 8 - jue., feb. 19

8:05 pm - 4:30 pm

LHR

SFO

28h 25m1 stop

12:50 pm - 7:25 am

SFO

LHR

10h 35mnonstop

$628Multiple Airlines

lun., ene. 12 - lun., ene. 26

9:15 am - 5:30 pm

LCY

SFO

15h 15m1 stop

7:15 pm - 6:35 pm

SFO

LCY

15h 20m1 stop

$629Multiple Airlines

lun., mar. 9 - mar., mar. 31

6:50 am - 9:22 pm

LHR

SFO

22h 32m2 stops

6:00 pm - 11:50 am

SFO

LHR

33h 50m1 stop

$629Air Canada

mié., ene. 14 - mié., feb. 18

3:25 pm - 7:45 pm

LHR

SFO

11h 20mnonstop

6:30 pm - 12:00 pm

SFO

LHR

10h 30mnonstop

$631British Airways

mié., mar. 18 - lun., mar. 23

3:25 pm - 6:45 pm

LHR

SFO

11h 20mnonstop

6:30 pm - 12:00 pm

SFO

LHR

10h 30mnonstop

$633British Airways

lun., mar. 2 - mar., mar. 10

British Airways flights from London to San Francisco

Our best British Airways deals on London to San Francisco flight tickets

British Airways

Mar 2

LHR3:25 pmLondon Heathrow

11h 20m

SFO6:45 pmSan Francisco

Mar 10

SFO6:30 pmSan Francisco

10h 30m

LHR12:00 pmLondon Heathrow

$633

Find similar

British Airways

Apr 27

LHR10:45 amLondon Heathrow

11h 05m

SFO1:50 pmSan Francisco

May 20

SFO4:35 pmSan Francisco

10h 25m

LHR11:00 amLondon Heathrow

$649

Find similar

British Airways

Jan 30

LHR3:25 pmLondon Heathrow

11h 20m

SFO6:45 pmSan Francisco

Feb 5

SFO2:36 pmSan Francisco

13h 39m

1 stop

LHR12:15 pmLondon Heathrow

$653

Find similar

Aer Lingus flights from London to San Francisco

Our best Aer Lingus deals on London to San Francisco flight tickets

Aer Lingus

Mar 9

LHR9:50 amLondon Heathrow

13h 45m

1 stop

SFO4:35 pmSan Francisco

Mar 13

SFO6:20 pmSan Francisco

14h 15m

1 stop

LHR3:35 pmLondon Heathrow

$639

Find similar

Aer Lingus

Apr 7

LHR8:50 amLondon Heathrow

14h 55m

1 stop

SFO3:45 pmSan Francisco

Apr 14

SFO5:45 pmSan Francisco

13h 10m

1 stop

LHR2:55 pmLondon Heathrow

$671

Find similar

Aer Lingus

Dec 15

LHR8:50 amLondon Heathrow

14h 45m

1 stop

SFO3:35 pmSan Francisco

Dec 23

SFO5:20 pmSan Francisco

14h 15m

1 stop

LHR3:35 pmLondon Heathrow

$778

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Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

mié. 2/4

9:00 am-9:22 pm

2 stops20h 22m

San Francisco

mié. 2/18

1:20 pm-11:50 am

1 stop14h 30m

$625

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

lun. 1/19

7:40 am-7:35 pm

1 stop19h 55m

San Francisco

jue. 1/29

5:25 pm-12:00 pm

Nonstop10h 35m

$626

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

lun. 1/12

1:35 pm-11:00 pm

1 stop17h 25m

San Francisco

lun. 1/26

12:50 pm-7:25 am

Nonstop10h 35m

$627

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

lun. 1/12

6:40 pm-4:30 pm

1 stop29h 50m

San Francisco

lun. 1/26

7:25 pm-5:50 pm

1 stop14h 25m

$627

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

dom. 2/8

6:40 pm-4:30 pm

1 stop29h 50m

San Francisco

jue. 2/19

7:25 pm-5:50 pm

1 stop14h 25m

$628

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

lun. 1/12

8:05 pm-4:30 pm

1 stop28h 25m

San Francisco

lun. 1/26

12:50 pm-7:25 am

Nonstop10h 35m

$628

LondonSan Francisco

LCY - SFO

LCYSFO

London City

lun. 3/9

9:15 am-5:30 pm

1 stop15h 15m

San Francisco

mar. 3/31

7:15 pm-6:35 pm

1 stop15h 20m

$629

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

mié. 1/14

6:50 am-9:22 pm

2 stops22h 32m

San Francisco

mié. 2/18

6:00 pm-11:50 am

1 stop33h 50m

$629

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

mié. 3/18

3:25 pm-7:45 pm

Nonstop11h 20m

San Francisco

lun. 3/23

6:30 pm-12:00 pm

Nonstop10h 30m

$631

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

lun. 3/2

3:25 pm-6:45 pm

Nonstop11h 20m

San Francisco

mar. 3/10

6:30 pm-12:00 pm

Nonstop10h 30m

$633

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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

Prices

Airlines

Delays

Layovers

Other information

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 September is also cheap. Prices for this month can be found on momondo for an average of $573.

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 $678. The most expensive day to fly to San Francisco is Friday, with ticket prices averaging around $747.

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 $737.

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 $679 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 $640 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 December 2025, prices for London to San Francisco flights are approximately 1% 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	$524
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 $524. The best round-trip flight deal from London to San Francisco found on momondo in the last 72 hours is $746.

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)

Search flight deals

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 11h 05m.
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?
There are 12 operators available for flights from London to San Francisco Airport as of December 2025.
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?
Based on momondo bookings for flights between London and San Francisco, the leading plane model is Boeing 777, making up 37.92% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 23.18%, Airbus A380-800 with 16.91%, and Boeing 777-300ER with 12.07%.
What is the most popular airline from London to San Francisco?
momondo data reveals that the most frequently booked airline on the route from London to San Francisco is British Airways, representing 24% of all bookings. The subsequent popular airlines are United Airlines at 22%, Lufthansa at 10%, and Delta at 10%.

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
Aer Lingus	PriceFrom $492	Free Cancellation	Rating 7.2 1,389 reviews	Search Aer Lingus flights
British Airways	PriceFrom $520	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
Scandinavian Airlines	PriceFrom $520	Free Cancellation	Rating 7.4 1,602 reviews	Search Scandinavian Airlines flights
Brussels Airlines	PriceFrom $530	Free Cancellation	Rating 7.2 375 reviews	Search Brussels Airlines flights
United Airlines	PriceFrom $534	Free Cancellation	Rating 7.4 9,089 reviews	Search United Airlines flights
Lufthansa	PriceFrom $545	Free Cancellation	Rating 6.8 7,618 reviews	Search Lufthansa flights
Virgin Atlantic	PriceFrom $550	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $555	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
Austrian Airlines	PriceFrom $567	Free Cancellation	Rating 7.6 879 reviews	Search Austrian Airlines flights
American Airlines	PriceFrom $589	Free Cancellation	Rating 7.2 11,045 reviews	Search American Airlines flights

Delta Flights From London to San Francisco
Delta flies from London to San Francisco around 7 times per week, with 8,011 momondo users rating the airline 7.9/10. 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
$567 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 $730, however, with flight time and availability significantly affecting the price. Austrian Airlines (7.6/10 from 879 user reviews) flies into San Francisco from London 14 times in an average week so prices can vary.

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Berkeley

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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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Cheap flights from London to San Francisco from $487

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 1/11. 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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Our best Aer Lingus deals on London to San Francisco flight tickets

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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 September is also cheap. Prices for this month can be found on momondo for an average of $573.

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 $678. The most expensive day to fly to San Francisco is Friday, with ticket prices averaging around $747.

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 $737.

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?

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 December 2025, prices for London to San Francisco flights are approximately 1% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from London to San Francisco?

TAP AIR PORTUGAL, United Airlines, and SWISS are the most popular carriers operating from London to San Francisco

What airlines fly to San Francisco?

How often are flights from London to San Francisco delayed?

Historically, on average around 13% of flights between London and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 140 minutes.

What is the most punctual flight time for London to San Francisco flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on London to San Francisco flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between London and San Francisco?

Copenhagen (CPH) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from London to San Francisco?

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $577.

Which layover airport has the shortest travel time from London to San Francisco?

Flights connecting via Copenhagen (CPH) have the shortest average one-way travel time: 14h 45m.

Which layover airport has the shortest connection time from London to San Francisco?

Copenhagen (CPH) has the shortest average layover time for this route: 2h 04m.

How many flights depart from London to San Francisco on average per day?

The number of flights available between London and San Francisco is 31 per day as of December 2025. The most frequent departure time is 11:00AM, with 58% of daily flights leaving at noon.

How many flights depart from London to San Francisco on average per week?

As of December 2025, 217 flights take off from London and land in San Francisco each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

When to book flights from London to San Francisco

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

Fastest flight time

Direct flights

Airports in San Francisco

How far is London to San Francisco by plane?

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

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?

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

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

Delta Flights From London to San Francisco

Austrian Airlines Flights From London to San Francisco

Traveling to a place near San Francisco?

Why use momondo?