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
28 May - 13 Jun	Eurowings	direct
28 May - 01 Jun	Eurowings	direct
28 May - 04 Jun	Eurowings	direct
11 May - 14 May	Eurowings	direct
04 May - 18 May	Eurowings	direct
25 May - 08 Jun	Eurowings	direct
09 May - 23 May	Eurowings	direct
14 May - 28 May	Eurowings	direct
13 May - 18 May	Ryanair
18 May - 31 May	Eurowings
07 May - 10 May	Eurowings
15 May - 19 May	Ryanair
14 May - 19 May	Eurowings
27 May - 07 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 99€

Return flights