We have prepared for you the list of the cheapest deals for Ryanair flight from Porto (OPO) to Castellón (CDT) by the month of departure.
Cheapest flights for June 2026
| Departure date | Cheapest price | |
|---|---|---|
| 21 Jun 2026 | 19 € | Book Now |
| 25 Jun 2026 | 39 € | Book Now |
| 11 Jun 2026 | 41 € | Book Now |
| 28 Jun 2026 | 41 € | Book Now |
| 14 Jun 2026 | 47 € | Book Now |
Cheapest flights for July 2026
| Departure date | Cheapest price | |
|---|---|---|
| 12 Jul 2026 | 30 € | Book Now |
| 16 Jul 2026 | 30 € | Book Now |
| 19 Jul 2026 | 30 € | Book Now |
| 30 Jul 2026 | 38 € | Book Now |
| 05 Jul 2026 | 39 € | Book Now |
Cheapest flights for August 2026
| Departure date | Cheapest price | |
|---|---|---|
| 09 Aug 2026 | 30 € | Book Now |
| 02 Aug 2026 | 36 € | Book Now |
| 06 Aug 2026 | 46 € | Book Now |
| 30 Aug 2026 | 46 € | Book Now |
| 27 Aug 2026 | 64 € | Book Now |
Cheapest flights for September 2026
| Departure date | Cheapest price | |
|---|---|---|
| 10 Sep 2026 | 36 € | Book Now |
| 24 Sep 2026 | 39 € | Book Now |
| 17 Sep 2026 | 40 € | Book Now |
| 27 Sep 2026 | 40 € | Book Now |
| 13 Sep 2026 | 50 € | Book Now |
The deals are updated by AirHint regularly. Please keep in mind that the price may go up as tickets are purchased by other travellers. Only the cheapest one-way flights are offered. Book fast to secure these cheap Ryanair prices.
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