AirHint found the following cheapest return flights from Sacramento (SMF) to London (LHR) in December 2025 (see full year).
Return flights
| 06 Dec - 13 Dec | Virgin Atlantic | ||
| 16 Dec - 10 Jan | Virgin Atlantic | ||
| 15 Dec - 07 Jan | British Airways | ||
| 16 Dec - 07 Jan | Delta | ||
| 16 Dec - 29 Dec | British Airways | ||
| 20 Dec - 24 Dec | Icelandair |
Also check the deals for one-way flights from Sacramento to London in December.
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