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

Return flights

19 Jan - 30 Jan	TAP
19 Jan - 29 Jan	TAP
14 Jan - 21 Jan	TAP
22 Jan - 05 Feb	TAP
24 Jan - 14 Feb	TAP
19 Jan - 12 Feb	TAP
11 Jan - 18 Jan	Iberia
17 Jan - 24 Jan	Iberia
21 Jan - 28 Jan	TAP
28 Jan - 06 Feb	TAP
28 Jan - 11 Feb	TAP
28 Jan - 16 Feb	TAP
11 Jan - 16 Jan	Icelandair
20 Jan - 27 Jan	Icelandair
13 Jan - 20 Jan	Icelandair
13 Jan - 27 Jan	Icelandair
20 Jan - 03 Feb	Icelandair
27 Jan - 10 Feb	Icelandair
27 Jan - 23 Feb	Icelandair
28 Jan - 23 Feb	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 $426

Return flights