Cheapest return flights from Cologne to Porto in September from $137

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

Return flights

04 Sep - 11 Sep Eurowings direct
25 Sep - 16 Oct Ryanair direct
25 Sep - 14 Oct Ryanair direct
06 Sep - 11 Sep Eurowings direct
25 Sep - 10 Oct Ryanair direct
18 Sep - 09 Oct Eurowings
26 Sep - 16 Oct Ryanair direct
11 Sep - 25 Sep Eurowings direct
09 Sep - 16 Sep Ryanair
26 Sep - 14 Oct Ryanair direct
25 Sep - 09 Oct Ryanair direct
19 Sep - 25 Sep Ryanair direct
18 Sep - 25 Sep Ryanair direct
15 Sep - 25 Sep Ryanair
18 Sep - 09 Oct Ryanair direct
20 Sep - 25 Sep Ryanair
04 Sep - 25 Sep Eurowings direct
02 Sep - 04 Sep Ryanair
30 Sep - 16 Oct Ryanair direct
23 Sep - 14 Oct Ryanair direct

Also check the deals for one-way flights from Cologne to Porto in September.

Skyscanner

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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