San Francisco to London flights
Round trip · Economy · Prices per person in USD
Prices updated
Prices are low right now
$664 is $122 (16%) below the usual $786 for San Francisco → London.
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when San Francisco → London drops below your price.Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $664 (cheapest month) |
| November 2026 | $847 |
| December 2026 | No fares found yet |
| January 2027 | No fares found yet |
| February 2027 | No fares found yet |
| March 2027 | $726 |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | No fares found yet |
| July 2027 | $1,039 |
Cheapest dates in the next 4 months
Round trip, per person-
Oct 28 – Nov 4 7 nights · leave Wed$664 −16% vs usual$664 −16% vs usual Book
TAP Air Portugal 1 stop · 13h 40m -
Oct 21 – 27 6 nights · leave Wed$689 −12% vs usual$689 −12% vs usual Book
TAP Air Portugal 1 stop · 14h 00m
-
Oct 22 – 29 7 nights · leave Thu$689 −12% vs usual$689 −12% vs usual Book
TAP Air Portugal 1 stop · 14h 00m
-
Oct 23 – 30 7 nights · leave Fri$729 −7% vs usual$729 −7% vs usual Book
Air Canada 1 stop · 11h 37m -
Oct 21 – 26 5 nights · leave Wed$753$753 Book
TAP Air Portugal 1 stop · 14h 00m
-
Oct 23 – Nov 3 11 nights · leave Fri$791$791 Book
jetBlue 2 stops · 12h 36m -
Nov 21 – Dec 1 10 nights · leave Sat$847 +8% vs usual$847 +8% vs usual Book
jetBlue 1 stop · 12h 20m
-
Oct 27 – Nov 3 7 nights · leave Tue$849 +8% vs usual$849 +8% vs usual Book
Turkish Airlines 1 stop · 17h 15m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in London
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Airport transfer to London
Fixed prices from LHR on KiwitaxiTo see transfer prices here, turn on partner content in .
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Plan the rest of your trip
London · Oct 28 – Nov 4Travel insurance · EKTA Airport transfer · Kiwitaxi
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Good to know
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San Francisco to London: questions
How much is a flight from San Francisco to London?
The cheapest round trip we have found right now is $664, leaving October 28 and returning November 4. The usual price on this route is about $786, so this fare is 16% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from San Francisco to London?
October 2026, with round trips from $664. The most expensive month in our data is July (from $1,039). Based on the 4 months ahead we have prices for.
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 $664, departing October 28 and returning November 4, about 16% below the usual $786. Right now we're following 10 upcoming date combinations on this route. The cheapest month to fly in our data is October, from $664. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.