AirHint found the following cheapest return flights from Porto (OPO) to Seoul (ICN) in September 2026 (see full year).
Return flights
| 04 Sep - 18 Sep | Iberia | ||
| 01 Sep - 28 Sep | SWISS | ||
| 01 Sep - 27 Sep | LOT | ||
| 07 Sep - 21 Sep | LOT | ||
| 01 Sep - 12 Sep | LOT | ||
| 06 Sep - 19 Sep | LOT | ||
| 01 Sep - 11 Sep | SWISS | ||
| 16 Sep - 27 Sep | Lufthansa |
Also check the deals for one-way flights from Porto to Seoul in September.
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