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

Return flights

09 Oct - 20 Oct	TAP
17 Oct - 20 Oct	TAP
24 Oct - 31 Oct	TAP
09 Oct - 13 Oct	TAP
13 Oct - 20 Oct	TAP
16 Oct - 19 Oct	TAP
09 Oct - 21 Oct	TAP
02 Oct - 06 Oct	TAP
04 Oct - 18 Oct	Aer Lingus
08 Oct - 15 Oct	TAP
27 Oct - 03 Nov	Lufthansa
27 Oct - 03 Nov	Virgin Atlantic	direct
29 Oct - 05 Nov	British Airways	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 358€

Return flights