AirHint found the following cheapest one-way flights from Sapporo (CTS) to Seoul (ICN) in April 2026 (see full year).
One-Way flights
| 02 Apr | Korean Air | direct | |
| 28 Apr | Korean Air | direct | |
| 11 Apr | Korean Air | direct | |
| 18 Apr | Korean Air | direct | |
| 21 Apr | ANA |
Also check the deals for return flights from Sapporo to Seoul in April.
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