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

Return flights

24 Dec - 08 Jan	Ryanair
24 Dec - 31 Dec	Ryanair
24 Dec - 30 Dec	Ryanair
27 Dec - 17 Jan	Ryanair
15 Dec - 08 Jan	Ryanair
15 Dec - 15 Jan	Ryanair
08 Dec - 14 Dec	Ryanair
12 Dec - 14 Dec	Ryanair
14 Dec - 11 Jan	Ryanair
15 Dec - 31 Dec	Ryanair
17 Dec - 14 Jan	Ryanair
12 Dec - 31 Dec	Ryanair
07 Dec - 14 Dec	Ryanair
14 Dec - 06 Jan	Ryanair
05 Dec - 08 Jan	Ryanair
17 Dec - 08 Jan	Ryanair
05 Dec - 09 Dec	Ryanair
26 Dec - 08 Jan	Ryanair
03 Dec - 09 Dec	Ryanair
05 Dec - 07 Dec	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 $560

Return flights