Cheapest return flights from London to Boston in December from $415

Best time to book flights for London (LON) to Boston (BOS) flights at AirHint

AirHint found the following cheapest return flights from London (LON) to Boston (BOS) in December 2025 (see full year).

Return flights

03 Dec - 03 Dec Fly Play
06 Dec - 06 Dec Fly Play
03 Dec - 06 Dec Fly Play
04 Dec - 07 Dec Fly Play
02 Dec - 02 Dec Fly Play
04 Dec - 04 Dec Fly Play
05 Dec - 05 Dec Fly Play
07 Dec - 07 Dec Fly Play
08 Dec - 08 Dec Fly Play
09 Dec - 09 Dec Fly Play
16 Dec - 04 Jan Fly Play
28 Dec - 11 Jan SWISS
26 Dec - 03 Jan United
26 Dec - 02 Jan United
28 Dec - 04 Jan Fly Play
28 Dec - 11 Jan Air France direct
27 Dec - 03 Jan Fly Play
17 Dec - 03 Jan Lufthansa
26 Dec - 02 Jan Air France direct
16 Dec - 04 Jan Air France direct

Also check the deals for one-way flights from London to Boston in December.

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.

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