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

Return flights

29 Sep - 08 Oct	Ryanair
28 Sep - 02 Oct	Ryanair
21 Sep - 27 Sep	Ryanair
30 Sep - 02 Oct	Ryanair
29 Sep - 02 Oct	Ryanair
13 Sep - 22 Sep	Ryanair
16 Sep - 19 Sep	Ryanair
13 Sep - 19 Sep	Lufthansa
19 Sep - 22 Sep	Ryanair
05 Sep - 07 Sep	Lufthansa
12 Sep - 22 Sep	Ryanair
26 Sep - 29 Sep	Lufthansa
10 Sep - 14 Sep	Ryanair
30 Sep - 03 Oct	Ryanair
01 Sep - 03 Sep	Eurowings
20 Sep - 25 Oct	Ryanair

Also check the deals for one-way flights from Cologne to Gdansk 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.

Book a cheap hotel in Gdansk

Cheap car rent in Gdansk

Cheapest return flights from Cologne to Gdansk in September from 135€

Return flights