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

Return flights

05 Oct - 19 Oct	Condor	direct
28 Oct - 04 Nov	Aer Lingus
02 Oct - 06 Oct	Condor	direct
07 Oct - 13 Oct	KLM
27 Oct - 02 Nov	TAP
15 Oct - 29 Oct	Aer Lingus
07 Oct - 13 Oct	Condor	direct
16 Oct - 22 Oct	TAP
06 Oct - 14 Oct	Condor	direct
12 Oct - 01 Nov	Aer Lingus
10 Oct - 11 Oct	Aer Lingus
23 Oct - 30 Oct	Condor
29 Oct - 05 Nov	Icelandair
04 Oct - 25 Oct	Aer Lingus
31 Oct - 07 Nov	Icelandair
29 Oct - 05 Nov	Lufthansa	direct
28 Oct - 04 Nov	Lufthansa	direct
12 Oct - 01 Nov	Lufthansa	direct
19 Oct - 02 Nov	Lufthansa	direct
27 Oct - 03 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 401€

Return flights