AirHint found the following cheapest return flights from Stockholm (ARN) to Cologne (CGN) in September 2025 (see full year).

Return flights

16 Sep - 30 Sep	Ryanair	direct
27 Sep - 30 Sep	Ryanair	direct
30 Sep - 04 Oct	Ryanair	direct
09 Sep - 27 Sep	Ryanair	direct
28 Sep - 07 Oct	Ryanair
28 Sep - 30 Sep	Ryanair
26 Sep - 08 Oct	Eurowings	direct
09 Sep - 16 Sep	Ryanair	direct
26 Sep - 30 Sep	Eurowings	direct
27 Sep - 04 Oct	Ryanair	direct
20 Sep - 27 Sep	Ryanair	direct
09 Sep - 17 Sep	Ryanair
30 Sep - 03 Oct	Ryanair
09 Sep - 13 Sep	Ryanair
09 Sep - 11 Sep	Ryanair
19 Sep - 04 Oct	Eurowings	direct
12 Sep - 04 Oct	Eurowings	direct
28 Sep - 05 Oct	Eurowings

Also check the deals for one-way flights from Stockholm to Cologne 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 Stockholm to Cologne in September from $87

Return flights