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

Return flights

04 May - 07 May	Eurowings	direct
18 May - 01 Jun	Eurowings	direct
04 May - 18 May	Eurowings	direct
14 May - 28 May	Eurowings	direct
13 May - 17 May	Eurowings
14 May - 17 May	Eurowings
13 May - 27 May	Ryanair
08 May - 10 May	Eurowings
17 May - 31 May	Lufthansa

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 99€

Return flights