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

Return flights

11 Jan - 18 Jan	Icelandair
21 Jan - 28 Jan	Icelandair
31 Jan - 07 Feb	Icelandair
09 Jan - 15 Jan	Icelandair
01 Jan - 08 Jan	Icelandair
21 Jan - 28 Jan	Lufthansa	direct
11 Jan - 18 Jan	Lufthansa	direct
09 Jan - 15 Jan	Lufthansa	direct
31 Jan - 07 Feb	Lufthansa	direct
01 Jan - 08 Jan	Lufthansa	direct

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 $507

Return flights