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

Return flights

05 Sep - 19 Sep	Condor	direct
05 Sep - 12 Sep	Condor	direct
09 Sep - 16 Sep	Condor
24 Sep - 01 Oct	Condor
29 Sep - 06 Oct	Condor
16 Sep - 23 Sep	Condor
30 Sep - 07 Oct	Condor
17 Sep - 23 Sep	Condor
08 Sep - 15 Sep	Condor
17 Sep - 24 Sep	Condor
11 Sep - 16 Sep	Condor
18 Sep - 25 Sep	Condor
22 Sep - 29 Sep	Condor
25 Sep - 02 Oct	Condor
28 Sep - 05 Oct	Condor
09 Sep - 07 Oct	Condor
27 Sep - 04 Oct	Condor
26 Sep - 03 Oct	Condor
16 Sep - 11 Oct	Condor

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

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 Portland to Frankfurt in September from $583

Return flights