Question 1

What is the cheapest flight from London to San Francisco?

Accepted Answer

In the last 3 days, the lowest price for a flight from London to San Francisco was $193 for a one-way ticket and $274 for a round-trip. <a href='/flight-routes/London-YXU/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between London and San Francisco?

Accepted Answer

A passport is required to fly from London to San Francisco. <a href='/flight-routes/London-YXU/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 3

Which aircraft models fly most regularly from London to San Francisco?

Accepted Answer

We unfortunately don’t have that data for this specific route.

Question 4

What is the cheapest month to fly from London to San Francisco?

Accepted Answer

The cheapest month for flights from London to San Francisco is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $806 and $703 respectively.

Question 5

What is the cheapest month to fly from London to San Francisco?

Accepted Answer

The cheapest month for flights from London to San Francisco is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $806 and $703 respectively.

Question 6

How does KAYAK find such low prices on flights from London to San Francisco?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco. <a href='/flight-routes/London-YXU/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 7

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to San Francisco?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/London-YXU/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 8

What is the Hacker Fare option on flights from London to San Francisco?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to London with another airline. Booking your flights between London and SFO can sometimes prove cheaper using this method. <a href='/flight-routes/London-YXU/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 9

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to San Francisco?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/London-YXU/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 10

What is the cheapest layover airport when flying from London to San Francisco?

Accepted Answer

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of $441.

Question 11

What is the most popular layover airport when flying from London to San Francisco?

Accepted Answer

Toronto (YYZ) is the top choice – 86% of KAYAK users who clicked on 1-stop flights from London to San Francisco picked an itinerary connecting there.

Question 12

Which layover airport has the quickest connection when flying from London to San Francisco?

Accepted Answer

If you prefer a quick connection, Calgary (YYC) often has the shortest layovers from London to San Francisco, with an average of 1h 48m.

Question 13

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

Accepted Answer

Consider flying via Calgary (YYC) for the shortest journey. The average one-way travel time for flights connecting there is 8h 50m.

Question 14

Which airlines provide the cheapest flights from London to San Francisco?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from London to San Francisco were found on WestJet ($274) and United Airlines ($412).

Question 15

Which airlines provide the cheapest flights from London to San Francisco?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from London to San Francisco were found on WestJet ($274) and United Airlines ($412).

Question 16

How much is a round-trip flight from London, Ontario to San Francisco?

Accepted Answer

Flight prices are below average for this route right now.Flights to San Francisco from London, Ontario usually cost between $386 and $310 in July.
The lowest price found in the past 3 days was $274 on WestJet (Jul 9-Jul 29).

Question 17

What are the most popular airlines flying to San Francisco?

Accepted Answer

The most popular airline among KAYAK users flying to San Francisco is Air Canada, followed by Porter Airlines and United Airlines.

Low season	August
High season	August
Cheapest flight	$193

YXU - SFO

$193 Find Cheap Flights from London to San Francisco

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

Everything you should know

Cheap Flights from London to San Francisco (YXU-SFO)

Recent round-trip flight deals from London to San Francisco

Recent one-way flight deals from London to San Francisco

KAYAK's insights & trends for London to San Francisco flights

Get data-powered insights and trends into flights from London to San Francisco to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from London, Ontario to San Francisco?

What is the cheapest month to fly from London to San Francisco?

The cheapest month for flights from London to San Francisco is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $806 and $703 respectively.

Which airlines provide the cheapest flights from London to San Francisco?

In the past 3 days, the cheapest round-trip tickets from London to San Francisco were found on WestJet ($274) and United Airlines ($412).

What is the most popular layover airport when flying from London to San Francisco?

Toronto (YYZ) is the top choice – 86% of KAYAK users who clicked on 1-stop flights from London to San Francisco picked an itinerary connecting there.

What is the cheapest layover airport when flying from London to San Francisco?

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of $441.

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

Consider flying via Calgary (YYC) for the shortest journey. The average one-way travel time for flights connecting there is 8h 50m.

Which layover airport has the quickest connection when flying from London to San Francisco?

If you prefer a quick connection, Calgary (YYC) often has the shortest layovers from London to San Francisco, with an average of 1h 48m.

Good to know

When to book flights from London to San Francisco

FAQs for booking flights from London to San Francisco

What is the cheapest flight from London to San Francisco?

In the last 3 days, the lowest price for a flight from London to San Francisco was $193 for a one-way ticket and $274 for a round-trip.

Do I need a passport to fly between London and San Francisco?

A passport is required to fly from London to San Francisco.

Which aircraft models fly most regularly from London to San Francisco?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from London to San Francisco?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to San Francisco?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from London to San Francisco?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to London with another airline. Booking your flights between London and SFO can sometimes prove cheaper using this method.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to San Francisco?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from London to San Francisco

Information on your arrival and departure airports

Cabin class types available on flights from London to San Francisco

Complete your trip to San Francisco with a hotel stay or car rental

Find direct flights to and from London and San Francisco

Flights to other popular destinations

Flights from domestic origins to San Francisco

Choose which airport to fly into in San Francisco

Find deals for your return flight