Cheapest one-way flights from San Francisco to London in September from 272€

Best time to book flights for San Francisco (SFO) to London (LGW) flights at AirHint

AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LGW) in September 2025 (see full year).

One-Way flights

28 Sep Alaska Airlines
23 Sep Iberia
10 Sep Alaska Airlines
16 Sep Alaska Airlines
02 Sep Alaska Airlines
14 Sep Alaska Airlines
19 Sep Alaska Airlines
09 Sep Alaska Airlines
15 Sep Alaska Airlines
26 Sep Alaska Airlines

Also check the deals for return flights from San Francisco to London in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London