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

Return flights

11 Aug - 24 Aug	Condor
19 Aug - 02 Sep	Condor
13 Aug - 20 Aug	Air Canada
24 Aug - 31 Aug	Condor
18 Aug - 31 Aug	Condor
12 Aug - 22 Aug	Condor
18 Aug - 03 Sep	Condor
04 Aug - 19 Aug	Condor
25 Aug - 29 Aug	Scandinavian Airlines
25 Aug - 28 Aug	Scandinavian Airlines
07 Aug - 14 Aug	Condor	direct
16 Aug - 02 Sep	Condor
27 Aug - 10 Sep	Condor
11 Aug - 18 Aug	Condor	direct
07 Aug - 21 Sep	Condor	direct
19 Aug - 02 Sep	Condor	direct
18 Aug - 03 Sep	Condor	direct
25 Aug - 08 Sep	Scandinavian Airlines
29 Aug - 13 Sep	Condor
30 Aug - 15 Sep	Condor

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

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 August from 470€

Return flights