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

Return flights

17 Jan - 31 Jan	TAP
18 Jan - 27 Jan	LEVEL
11 Jan - 15 Jan	Aer Lingus
15 Jan - 29 Jan	Icelandair
18 Jan - 01 Feb	Icelandair
30 Jan - 08 Feb	Icelandair
16 Jan - 25 Jan	TAP
10 Jan - 16 Jan	Icelandair
10 Jan - 17 Jan	Icelandair
14 Jan - 21 Jan	Icelandair
18 Jan - 25 Jan	Icelandair
20 Jan - 27 Jan	Icelandair
25 Jan - 01 Feb	Icelandair
28 Jan - 04 Feb	Icelandair
31 Jan - 07 Feb	Icelandair
23 Jan - 01 Feb	Icelandair
28 Jan - 04 Feb	Lufthansa	direct
18 Jan - 01 Feb	Lufthansa	direct
25 Jan - 01 Feb	Lufthansa	direct
23 Jan - 06 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 $437

Return flights