AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LGW) in December 2025 (see full year).
One-Way flights
| 16 Dec | Alaska Airlines | ||
| 14 Dec | Alaska Airlines | ||
| 15 Dec | Alaska Airlines | ||
| 23 Dec | SWISS | ||
| 21 Dec | WestJet | ||
| 19 Dec | Hawaiian Airlines |
Also check the deals for return flights from San Francisco to London in December.
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.
Find us on social media