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

Return flights

24 Sep - 01 Oct	Vueling Airlines
24 Sep - 30 Sep	Vueling Airlines
23 Sep - 01 Oct	Vueling Airlines
23 Sep - 30 Sep	Vueling Airlines
23 Sep - 20 Oct	Vueling Airlines
17 Sep - 22 Sep	Ryanair
25 Sep - 29 Sep	Vueling Airlines
16 Sep - 22 Sep	Vueling Airlines
25 Sep - 30 Sep	Ryanair
25 Sep - 06 Oct	Ryanair
17 Sep - 29 Sep	Vueling Airlines
24 Sep - 01 Oct	Ryanair	direct
22 Sep - 29 Sep	Vueling Airlines
24 Sep - 27 Sep	Vueling Airlines
24 Sep - 27 Sep	Ryanair	direct
30 Sep - 15 Oct	Ryanair
30 Sep - 05 Oct	Ryanair
30 Sep - 04 Oct	easyJet
29 Sep - 03 Oct	Ryanair
25 Sep - 09 Oct	Ryanair

Also check the deals for one-way flights from Lisbon 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.

Book a cheap hotel in Cologne

Cheap car rent in Cologne

Cheapest return flights from Lisbon to Cologne in September from 141€

Return flights