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

Return flights

13 Jan - 27 Jan	Icelandair
16 Jan - 30 Jan	Icelandair
30 Jan - 13 Feb	Icelandair
23 Jan - 30 Jan	Icelandair
13 Jan - 20 Jan	Icelandair
13 Jan - 27 Jan	Lufthansa	direct
13 Jan - 20 Jan	Lufthansa	direct
16 Jan - 30 Jan	Lufthansa	direct
30 Jan - 13 Feb	Lufthansa	direct
23 Jan - 30 Jan	Lufthansa	direct

Also check the deals for one-way flights from Seattle 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 Seattle to Frankfurt in January from $698

Return flights