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

Return flights

28 Jan - 04 Feb	Icelandair
27 Jan - 04 Feb	Icelandair
09 Jan - 13 Jan	Icelandair
11 Jan - 16 Jan	Icelandair
11 Jan - 31 Jan	Icelandair
17 Jan - 24 Jan	Icelandair
22 Jan - 29 Jan	Icelandair
09 Jan - 16 Jan	Icelandair
12 Jan - 19 Jan	Icelandair
12 Jan - 26 Jan	Icelandair
15 Jan - 29 Jan	Icelandair
27 Jan - 03 Feb	Icelandair
14 Jan - 21 Jan	TAP
28 Jan - 04 Feb	Lufthansa	direct
27 Jan - 04 Feb	Lufthansa	direct
27 Jan - 03 Feb	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 435€

Return flights