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

Return flights

08 Jul - 11 Jul	Ryanair
15 Jul - 17 Jul	Ryanair
13 Jul - 19 Jul	KLM
13 Jul - 27 Jul	Ryanair
21 Jul - 28 Jul	Ryanair
15 Jul - 23 Jul	Ryanair
09 Jul - 16 Jul	KLM
13 Jul - 20 Jul	Ryanair
07 Jul - 17 Jul	Ryanair
10 Jul - 16 Jul	Ryanair
31 Jul - 07 Aug	Lufthansa
30 Jul - 05 Aug	Ryanair
21 Jul - 03 Aug	Ryanair
18 Jul - 02 Aug	Ryanair
20 Jul - 12 Aug	Ryanair

Also check the deals for one-way flights from Zagreb 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.

Book a cheap hotel in Porto

Cheap car rent in Porto

Cheapest return flights from Zagreb to Porto in July from 214€

Return flights