Cheapest return flights from Boston to London in December from $492

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

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

Return flights

07 Dec - 13 Dec Icelandair
16 Dec - 30 Jan Icelandair
15 Dec - 22 Dec Icelandair
13 Dec - 20 Dec Icelandair
23 Dec - 31 Dec Icelandair
22 Dec - 02 Jan Fly Play
19 Dec - 31 Dec Fly Play
16 Dec - 03 Jan Fly Play
16 Dec - 02 Jan Fly Play
16 Dec - 29 Dec Icelandair
20 Dec - 03 Jan Fly Play
22 Dec - 29 Dec Icelandair
19 Dec - 28 Dec Fly Play
19 Dec - 27 Dec Fly Play
20 Dec - 27 Dec Icelandair

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

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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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