AirHint found the following cheapest return flights from Sapporo (CTS) to Seoul (ICN) in January 2026 (see full year).

Return flights

07 Jan - 24 Jan	Jin Air	direct
07 Jan - 12 Jan	Jin Air	direct
07 Jan - 17 Jan	Jin Air	direct
15 Jan - 24 Jan	Jin Air	direct
15 Jan - 17 Jan	Jin Air	direct
07 Jan - 26 Jan	Jin Air	direct
15 Jan - 26 Jan	Jin Air	direct
22 Jan - 24 Jan	Jin Air	direct
10 Jan - 24 Jan	Jin Air	direct
10 Jan - 12 Jan	Jin Air	direct
31 Jan - 02 Feb	Peach
31 Jan - 07 Feb	Korean Air	direct
31 Jan - 02 Feb	Korean Air	direct

Also check the deals for one-way flights from Sapporo to Seoul in January.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Sapporo to Seoul in January from 304€

Return flights