AirHint found the following cheapest return flights from Osaka (KIX) to Porto (OPO) in September 2026 (see full year).
Return flights
| 12 Sep - 23 Sep | Singapore Airlines | ||
| 04 Sep - 13 Sep | KLM | ||
| 11 Sep - 23 Sep | EVA Air | ||
| 13 Sep - 23 Sep | KLM |
Also check the deals for one-way flights from Osaka to Porto in September.
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