AirHint found the following cheapest return flights from Boston (BOS) to London (LGW) in January 2026 (see full year).

Return flights

27 Jan - 03 Feb	Iberia
25 Jan - 03 Feb	Iberia
26 Jan - 03 Feb	Iberia
31 Jan - 08 Feb	TAP
06 Jan - 13 Jan	Icelandair
11 Jan - 16 Jan	Icelandair
19 Jan - 26 Jan	Icelandair
29 Jan - 05 Feb	Icelandair
16 Jan - 18 Jan	Icelandair

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

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 Boston to London in January from 360€

Return flights