AirHint found the following cheapest return flights from Porto (OPO) to Seoul (ICN) in September 2026 (see full year).
Return flights
| 06 Sep - 19 Sep | Ryanair | ||
| 01 Sep - 11 Sep | Ryanair | ||
| 15 Sep - 22 Sep | KLM | ||
| 26 Sep - 03 Oct | SWISS |
Also check the deals for one-way flights from Porto to Seoul in September.
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