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

Return flights

12 May - 18 May	Jin Air	direct
15 May - 18 May	Jin Air	direct
08 May - 20 May	T'way Air	direct
14 May - 16 May	Jin Air	direct
21 May - 25 May	T'way Air	direct
15 May - 17 May	T'way Air	direct
01 May - 06 May	Jin Air	direct
09 May - 16 May	Jin Air	direct
01 May - 10 May	T'way Air	direct
01 May - 07 May	T'way Air	direct
30 May - 04 Jun	Asiana Airlines	direct

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

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 May from 151€

Return flights