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

Return flights

15 Oct - 17 Oct	Lufthansa
12 Oct - 14 Oct	SWISS
13 Oct - 15 Oct	Lufthansa
23 Oct - 23 Nov	TAP
27 Oct - 07 Nov	TAP
24 Oct - 01 Nov	TAP
15 Oct - 21 Oct	Iberia For Level
27 Oct - 29 Oct	Delta
15 Oct - 22 Oct	Iberia For Level
15 Oct - 08 Nov	Iberia For Level
14 Oct - 08 Nov	Iberia For Level
19 Oct - 08 Nov	Iberia For Level
13 Oct - 08 Nov	Iberia For Level
17 Oct - 08 Nov	TAP
22 Oct - 06 Nov	TAP
23 Oct - 06 Nov	TAP
15 Oct - 24 Oct	Virgin Atlantic
01 Oct - 08 Oct	Virgin Atlantic
15 Oct - 22 Oct	Virgin Atlantic	direct
08 Oct - 14 Oct	Virgin Atlantic	direct

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

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 October from 303€

Return flights