AirHint found the following cheapest return flights from Osaka (KIX) to Porto (OPO) in December 2025 (see full year).
Return flights
| 10 Dec - 16 Dec | KLM | ||
| 10 Dec - 17 Dec | KLM | ||
| 30 Dec - 03 Jan | KLM | ||
| 26 Dec - 03 Jan | Air France | ||
| 26 Dec - 01 Jan | Qatar Airways | ||
| 27 Dec - 01 Jan | Japan Airlines |
Also check the deals for one-way flights from Osaka to Porto in December.
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