AirHint found the following cheapest return flights from Chicago (ORD) to Seoul (ICN) in October 2026 (see full year).
Return flights
| 02 Oct - 17 Oct | Cathay Pacific | ||
| 02 Oct - 18 Oct | Cathay Pacific | ||
| 09 Oct - 25 Oct | EVA Air | ||
| 02 Oct - 17 Oct | Delta | direct | |
| 02 Oct - 18 Oct | Delta | direct | |
| 09 Oct - 25 Oct | Delta | direct |
Also check the deals for one-way flights from Chicago to Seoul in October.
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