San Francisco to London flights
The cheapest round trip we found from San Francisco to London is $782 (Jan 6 – 12, 2027, 1 stop), 19% below the usual $961.
SFO to LON · Round trip · Economy · Prices per person in USD · Price found (1 day ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $1,075 |
| December 2026 | $1,053 |
| January 2027 | $782 (cheapest month) |
| February 2027 | No fares found yet |
| March 2027 | $869 |
Cheapest dates in the next 4 months
Round trip, per person-
Jan 6 – 12, 2027 6 nights · leave Wed$782 −19% vs usual$782 −19% vs usual Book
jetBlue 1 stop · 12h 20m -
Dec 23 – Jan 6, 2027 14 nights · leave Wed$1,053 +10% vs usual$1,053 +10% vs usual Book
Alaska Airlines 3 stops · 16h 20m -
Dec 22 – 29 7 nights · leave Tue$1,345 +40% vs usual$1,345 +40% vs usual Book
Frontier Airlines 2 stops · 14h 17m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in London
Tickets and tours on KlookTo see tours and tickets here, turn on partner content in .
Partner widget: we may earn a commission if you book, at no extra cost to you.
Airport transfer to London
Fixed prices from LHR on KiwitaxiTo see transfer prices here, turn on partner content in .
Partner widget: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
London · Jan 6 – 12, 2027- eSIM for United Kingdom Yesim · prepaid mobile data (opens Yesim in a new tab)
- Car rental in United Kingdom Economybookings · compare rental companies (opens Economybookings in a new tab)
Partner links: we may earn a commission if you book, at no extra cost to you.
Good to know
More from San Francisco
-
-
- Ontario $68 −53%
-
-
-
-
-
Flights to London from other cities
All flights to London
San Francisco to London: questions
How much does a flight from San Francisco to London cost?
The cheapest round trip we have found right now is $782, leaving January 6 and returning January 12. The usual price on this route is about $961, so this fare is 19% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from San Francisco to London?
January 2027, with round trips from $782. The most expensive month in our data is November (from $1,075). Based on the 4 months ahead we have prices for.
Which airports do San Francisco to London flights use?
San Francisco airports include San Francisco International (SFO). London airports include London Heathrow (LHR), London City (LCY) and London Gatwick (LGW). The prices on this page cover every airport in both cities (SFO and LON are the city codes).
About this route
We track round-trip economy fares from San Francisco (United States) to London (United Kingdom) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $782, departing January 6 and returning January 12, about 19% below the usual $961. The cheapest month to fly in our data is January, from $782. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.