AirHint found the following cheapest return flights from Boston (BOS) to Seoul (ICN) in October 2026 (see full year).
Return flights
| 12 Oct - 19 Oct | Cathay Pacific | ||
| 03 Oct - 17 Oct | Cathay Pacific | ||
| 03 Oct - 17 Oct | Delta | direct | |
| 12 Oct - 19 Oct | Delta | direct |
Also check the deals for one-way flights from Boston to Seoul in October.
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