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

Return flights

31 Jul - 07 Aug	Condor
31 Jul - 05 Aug	Ryanair
29 Jul - 07 Aug	Ryanair
29 Jul - 04 Aug	Eurowings
30 Jul - 11 Aug	Eurowings
28 Jul - 06 Aug	Eurowings
28 Jul - 31 Jul	Eurowings
30 Jul - 03 Aug	Eurowings
31 Jul - 06 Aug	Eurowings
28 Jul - 04 Aug	Eurowings
29 Jul - 03 Aug	Eurowings
28 Jul - 30 Jul	Eurowings
28 Jul - 29 Jul	Eurowings
28 Jul - 31 Jul	Eurowings	direct
28 Jul - 29 Jul	Eurowings	direct

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

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 July from 308€

Return flights