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

Return flights

05 Oct - 12 Oct	TAP
01 Oct - 07 Oct	Aer Lingus
04 Oct - 11 Oct	TAP
16 Oct - 19 Oct	TAP
01 Oct - 08 Oct	Icelandair
03 Oct - 05 Oct	TAP
04 Oct - 11 Oct	jetBlue	direct
05 Oct - 11 Oct	Iberia For Level
12 Oct - 19 Oct	TAP
11 Oct - 19 Oct	TAP
26 Oct - 01 Nov	Icelandair
13 Oct - 24 Nov	Icelandair
31 Oct - 07 Nov	Icelandair

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 355€

Return flights