AirHint found the following cheapest return flights from Boston (BOS) to Frankfurt (FRA) in January 2026 (see full year).

Return flights

13 Jan - 20 Jan	Aer Lingus
14 Jan - 28 Jan	Aer Lingus
07 Jan - 14 Jan	Icelandair
12 Jan - 19 Jan	Icelandair
22 Jan - 29 Jan	Icelandair
12 Jan - 26 Jan	Icelandair
15 Jan - 29 Jan	Icelandair
15 Jan - 20 Jan	Aer Lingus
04 Jan - 09 Jan	Icelandair
02 Jan - 09 Jan	Icelandair

Also check the deals for one-way flights from Boston to Frankfurt in January.

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 January from 406€

Return flights