$383 Cheap Flights from London (LGW) to San Francisco (SFO)

View $383 flight on Wed, May 21, 2025Opens in a new window

Popular airlines from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO)

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Find available prices by choosing your travel dates.

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

Prices were available within the past 7 days and start at $383 for one-way flights and $538 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Mon, Oct 13 - Wed, Nov 5
LGW
London
SFO
San Francisco
$538 Roundtrip, found 2 days ago
$538
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Mon, Oct 13 from London to San Francisco, returning Wed, Nov 5, priced at $538 found 2 days ago
Swiss International Air Lines
Tue, May 13 - Fri, May 23
LGW
London
SFO
San Francisco
$547 Roundtrip, found 7 hours ago
$547
Roundtrip
found 7 hours ago
Select Swiss International Air Lines flight, departing Tue, May 13 from London to San Francisco, returning Fri, May 23, priced at $547 found 7 hours ago
TAP Portugal
Mon, Oct 13 - Sat, Oct 18
LGW
London
SFO
San Francisco
$554 Roundtrip, found 1 day ago
$554
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Mon, Oct 13 from London to San Francisco, returning Sat, Oct 18, priced at $554 found 1 day ago
Swiss International Air Lines
Tue, May 13 - Fri, May 23
LGW
London
SFO
San Francisco
$570 Roundtrip, found 7 hours ago
$570
Roundtrip
found 7 hours ago
Select Swiss International Air Lines flight, departing Tue, May 13 from London to San Francisco, returning Fri, May 23, priced at $570 found 7 hours ago
British Airways
Wed, May 7 - Wed, May 14
LGW
London
SFO
San Francisco
$580 Roundtrip, found 3 hours ago
$580
Roundtrip
found 3 hours ago
Select British Airways flight, departing Wed, May 7 from London to San Francisco, returning Wed, May 14, priced at $580 found 3 hours ago
American Airlines
Sat, Sep 6 - Wed, Sep 24
LGW
London
SFO
San Francisco
$582 Roundtrip, found 1 day ago
$582
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 6 from London to San Francisco, returning Wed, Sep 24, priced at $582 found 1 day ago
American Airlines
Sat, Sep 6 - Wed, Sep 24
LGW
London
SFO
San Francisco
$583 Roundtrip, found 1 day ago
$583
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 6 from London to San Francisco, returning Wed, Sep 24, priced at $583 found 1 day ago
American Airlines
Sat, Sep 6 - Wed, Sep 24
LGW
London
SFO
San Francisco
$584 Roundtrip, found 1 day ago
$584
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 6 from London to San Francisco, returning Wed, Sep 24, priced at $584 found 1 day ago
American Airlines
Thu, May 15 - Thu, May 22
LGW
London
SFO
San Francisco
$586 Roundtrip, found 7 hours ago
$586
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Thu, May 15 from London to San Francisco, returning Thu, May 22, priced at $586 found 7 hours ago
Iberia
Wed, May 7 - Wed, May 14
LGW
London
SFO
San Francisco
$666 Roundtrip, found 3 hours ago
$666
Roundtrip
found 3 hours ago
Select Iberia flight, departing Wed, May 7 from London to San Francisco, returning Wed, May 14, priced at $666 found 3 hours ago
Flights from London (LGW) to San Francisco (SFO)
Origin airport
Gatwick
Destination airport
San Francisco Intl.
Airlines serving
Air Europa, Air France, American Airlines, British Airways, Delta, Finnair, ITA Airways, Iberia, Icelandair, JetBlue Airways, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Roundtrip price
$538
Distance
5378 mi

London to San Francisco Flights

The cheapest times to fly from London to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to San Francisco are during the month of October. You can find some of the cheapest flights from London to San Francisco with Expedia's search tool and vast selection of airlines.

The best time to book a flight from London to San Francisco

Sunday is one of the best days to book for cheap flights from London to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from London to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from $383 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO) cost?
Discover the latest flight deals from LGW to SFO by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from LGW to SFO?
The cheapest flights from LGW to SFO are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO)?
Direct flights aren’t available from London (LGW-Gatwick) to San Francisco Intl. Airport (SFO). However, there are other airports that offer nonstop flights. Hop on your plane at Heathrow Airport (LHR) and head straight to San Francisco without any detours.
What is the cheapest airline that flies from LGW to SFO?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from LGW to SFO. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO)?
Direct flights from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from LGW to SFO?
Generally you’ll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO)?
Select a flight from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO) last-minute?
Last-minute fares from LGW to SFO are usually more expensive. To lock in the best prices, start looking for flights early. That being said, if your travel plans are flexible, it’s possible to land a cheap fare right before your journey.
Is it cheaper to book a LGW to SFO flight and hotel package?
Opting for a LGW to SFO flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our impressive range of stays and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Gatwick Airport (LGW) to San Francisco Intl. Airport (SFO)?
If you reserved your LGW to SFO flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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*Available to One Key members.