AirHint found the following cheapest return flights from Porto (OPO) to Seoul (ICN) in September 2026 (see full year).
Return flights
| 22 Sep - 16 Oct | Air Europa | ||
| 22 Sep - 28 Sep | Air Europa | ||
| 22 Sep - 29 Sep | TAP | ||
| 19 Sep - 03 Oct | easyJet | ||
| 04 Sep - 18 Sep | Ryanair | ||
| 04 Sep - 20 Sep | Ryanair | ||
| 07 Sep - 18 Sep | Lufthansa | ||
| 24 Sep - 01 Oct | Lufthansa |
Also check the deals for one-way flights from Porto to Seoul in September.
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