AirHint found the following cheapest return flights from Cologne (CGN) to Porto (OPO) in May 2026 (see full year).

Return flights

04 May - 11 May	Eurowings	direct
04 May - 07 May	Eurowings	direct
07 May - 11 May	Eurowings	direct
02 May - 04 May	Eurowings	direct
28 May - 11 Jun	Eurowings	direct
25 May - 08 Jun	Eurowings	direct
16 May - 20 May	Eurowings
04 May - 04 May	Eurowings
16 May - 25 May	Eurowings	direct
07 May - 07 May	Eurowings
08 May - 09 May	Ryanair
14 May - 18 May	Eurowings	direct
23 May - 06 Jun	Eurowings	direct
22 May - 05 Jun	Ryanair
24 May - 07 Jun	Ryanair

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

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 Cologne to Porto in May from 107€

Return flights