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

Return flights

09 Oct - 16 Oct	Icelandair
13 Oct - 20 Oct	Icelandair
30 Oct - 06 Nov	Icelandair
30 Oct - 13 Nov	Icelandair
06 Oct - 15 Oct	Icelandair
08 Oct - 23 Oct	Icelandair
08 Oct - 22 Oct	Icelandair
21 Oct - 02 Nov	Condor
08 Oct - 01 Nov	Condor
15 Oct - 22 Oct	Alaska Airlines
14 Oct - 28 Oct	Condor
27 Oct - 10 Nov	Condor	direct
21 Oct - 28 Oct	Condor
22 Oct - 29 Oct	Condor
26 Oct - 08 Nov	Condor	direct
14 Oct - 30 Oct	Condor
11 Oct - 01 Nov	Condor	direct
08 Oct - 01 Nov	Condor	direct
30 Oct - 22 Nov	Condor
28 Oct - 04 Nov	Icelandair

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

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 October from 406€

Return flights