Cheapest return flights from Seattle to Frankfurt in September from $566

Best time to book flights for Seattle (SEA) to Frankfurt (FRA) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Frankfurt (FRA) in September 2025 (see full year).

Return flights

04 Sep - 18 Sep Condor direct
01 Sep - 15 Sep Condor direct
15 Sep - 29 Sep Condor direct
12 Sep - 28 Sep Condor direct
02 Sep - 05 Oct Icelandair
02 Sep - 04 Oct Icelandair
19 Sep - 24 Oct Turkish Airlines
17 Sep - 25 Oct Air Canada
19 Sep - 24 Oct Lufthansa direct
02 Sep - 05 Oct Condor direct
02 Sep - 04 Oct Condor direct

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

Skyscanner

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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