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

Return flights

06 Oct - 20 Oct	Icelandair
09 Oct - 26 Oct	Icelandair
27 Oct - 12 Nov	Aer Lingus
09 Oct - 23 Oct	Icelandair
28 Oct - 11 Nov	Delta
09 Oct - 23 Oct	Condor	direct
28 Oct - 04 Nov	Icelandair
07 Oct - 14 Oct	Icelandair
16 Oct - 23 Oct	Icelandair
22 Oct - 29 Oct	Icelandair
01 Oct - 08 Oct	Icelandair
09 Oct - 16 Oct	Icelandair
09 Oct - 16 Oct	Condor	direct
12 Oct - 01 Nov	Virgin Atlantic
25 Oct - 01 Nov	Icelandair
31 Oct - 07 Nov	Icelandair
28 Oct - 04 Nov	Lufthansa	direct
12 Oct - 01 Nov	Lufthansa	direct
25 Oct - 01 Nov	Lufthansa	direct

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 $461

Return flights