AirHint found the following cheapest return flights from Boston (BOS) to Seoul (ICN) in October 2026 (see full year).
Return flights
| 06 Oct - 20 Oct | Cathay Pacific | ||
| 05 Oct - 12 Oct | Cathay Pacific | ||
| 01 Oct - 11 Oct | Cathay Pacific | ||
| 05 Oct - 12 Oct | Delta | direct | |
| 01 Oct - 11 Oct | Delta | direct |
Also check the deals for one-way flights from Boston to Seoul in October.
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