AirHint found the following cheapest return flights from Porto (OPO) to Zagreb (ZAG) in May 2026 (see full year).
Return flights
| 13 May - 18 May | Ryanair | ||
| 28 May - 08 Jun | Wizz Air Malta | ||
| 01 May - 05 May | Ryanair | ||
| 01 May - 06 May | Ryanair | ||
| 25 May - 31 May | Ryanair | ||
| 01 May - 03 May | Ryanair |
Also check the deals for one-way flights from Porto to Zagreb in May.
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