Find cheap flights from London to San Francisco

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

Round-trip
One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to book flights from London to San Francisco?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

23 30
Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8
8 15

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

When are flight tickets from London (LON) to San Francisco (SFO) the cheapest?

Airlines adjust prices for flights from London to San Francisco based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from London (LON) to San Francisco (SFO) cost?

According to Trip.com's data, the lowest price is around $1,257.
How long does it take to fly from London (LON) to San Francisco (SFO) and what is the distance?

It takes around 11 hours 6 minutes to fly from London (LON) to San Francisco (SFO).
What is the transportation method from the main airport to downtown in San Francisco?
- The distance from San Francisco Intl. Airport to downtown is about 17 km. It takes about 30 minutes by taxi.
What are the most popular airlines that fly from London (LON) to San Francisco (SFO)?

Airlines with flights from London (LON) to San Francisco (SFO): Delta Air Lines, Iberia, Alaska Airlines, Lufthansa, Finnair, British Airways, American Airlines, Swiss Airlines, Air Canada, United Airlines, Brussels Airlines, Air New Zealand and Aer Lingus.

How to find a cheap flight from London to San Francisco

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from London to San Francisco. Book your flights at the right time and save more.

Being flexible with your dates to get the cheapest London to San Francisco ticket.

Tap "Date" on flight search bar to scan through the calender for London to San Francisco airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Sun, Mar 30 at US$967 for one-way flights.

Compare cheap London to San Francisco flight deals from over hundreds of airlines.

Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from London to San Francisco. The cheapest airline operating is British Airways.

Set up a Price Alert

By setting up a Price Alert for your London to San Francisco route, you can easily track the price of your airline tickets from London to San Francisco without manually checking every day.

Don't miss cheap London to San Francisco flight deals and promo codes.

You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights for cheap flights. If registering a free membership, you can receive more deals for your flights.

Book early or wait unitl the last minute.

It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.

Search for flights on the go.

To get the best flight booking experience on the go, download Trip.com free app and search for cheap flight tickets from London to San Francisco to get exclusive deals for you.

London to San Francisco Flight Information

Cheapest one-way flight price	$358
Cheapest round-trip ticket price	$515
Off-season for travel	May
Peak season for travel	December
Flight distance	8,628.48 km
Average flight time	11 hours 6 minutes
Popular airline	Finnair