AirHint found the following cheapest return flights from Bangkok (BKK) to Porto (OPO) in December 2025 (see full year).
Return flights
| 13 Dec - 18 Dec | Norse Atlantic Airways | ||
| 29 Dec - 06 Jan | Turkish Airlines | ||
| 13 Dec - 01 Jan | British Airways | ||
| 26 Dec - 03 Jan | Air France | ||
| 16 Dec - 26 Dec | Etihad Airways |
Also check the deals for one-way flights from Bangkok to Porto in December.
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