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

Return flights

09 Mar - 23 Mar	Condor	direct
02 Mar - 10 Mar	Lufthansa	direct
09 Mar - 18 Mar	Aer Lingus
24 Mar - 01 Apr	Lufthansa	direct
13 Mar - 20 Mar	Lufthansa	direct
10 Mar - 19 Mar	Turkish Airlines
13 Mar - 21 Mar	Lufthansa	direct
06 Mar - 20 Mar	Turkish Airlines
29 Mar - 05 Apr	Lufthansa	direct
29 Mar - 06 Apr	Lufthansa	direct
28 Mar - 05 Apr	Lufthansa	direct
16 Mar - 23 Mar	Icelandair
10 Mar - 19 Mar	Lufthansa	direct
06 Mar - 13 Mar	Icelandair

Also check the deals for one-way flights from Seattle to Frankfurt in March.

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 March from 444€

Return flights