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

Return flights

26 Oct - 06 Nov	Aer Lingus
07 Oct - 21 Oct	Aer Lingus
14 Oct - 28 Oct	Aer Lingus
28 Oct - 04 Nov	Icelandair
30 Oct - 03 Nov	Icelandair
16 Oct - 23 Oct	Icelandair
22 Oct - 29 Oct	Icelandair
29 Oct - 05 Nov	Icelandair
13 Oct - 20 Oct	Icelandair
07 Oct - 14 Oct	Icelandair
09 Oct - 16 Oct	Icelandair
14 Oct - 21 Oct	Icelandair
20 Oct - 27 Oct	Icelandair
23 Oct - 30 Oct	Icelandair
12 Oct - 01 Nov	Aer Lingus
07 Oct - 01 Nov	Virgin Atlantic
26 Oct - 02 Nov	Delta
10 Oct - 01 Nov	Aer Lingus
25 Oct - 01 Nov	Icelandair
31 Oct - 07 Nov	Icelandair

Also check the deals for one-way flights from Boston to Frankfurt 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 Frankfurt in October from 406€

Return flights