AirHint found the following cheapest return flights from Buffalo (BUF) to London (LGW) in December 2025 (see full year).
Return flights
| 04 Dec - 12 Dec | Frontier Airlines | ||
| 03 Dec - 09 Dec | TAP | ||
| 29 Dec - 18 Jan | Frontier Airlines | ||
| 09 Dec - 03 Jan | TAP | ||
| 24 Dec - 04 Jan | Frontier Airlines | ||
| 27 Dec - 04 Jan | Frontier Airlines | ||
| 10 Dec - 19 Dec | TAP |
Also check the deals for one-way flights from Buffalo to London in December.
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