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

Return flights

11 Dec - 17 Dec	Ryanair
11 Dec - 16 Dec	Ryanair
14 Dec - 28 Dec	Ryanair
13 Dec - 14 Jan	Ryanair
12 Dec - 14 Jan	Ryanair
09 Dec - 14 Dec	Ryanair
07 Dec - 14 Dec	Ryanair
10 Dec - 14 Dec	Ryanair
05 Dec - 10 Dec	Ryanair
03 Dec - 06 Dec	Ryanair
13 Dec - 03 Jan	Ryanair
10 Dec - 17 Dec	Ryanair
01 Dec - 30 Dec	Ryanair
12 Dec - 05 Jan	Ryanair
24 Dec - 12 Jan	Ryanair
27 Dec - 05 Jan	Ryanair
16 Dec - 10 Jan	Ryanair
22 Dec - 13 Jan	Ryanair
12 Dec - 07 Jan	Ryanair
28 Dec - 05 Jan	Ryanair

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

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Cheapest return flights from London to Boston in December from $482

Return flights