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

Return flights

14 May - 18 May	Jin Air	direct
11 May - 13 May	Jin Air	direct
12 May - 17 May	Jin Air	direct
12 May - 14 May	Jin Air	direct
20 May - 27 May	Jin Air	direct
16 May - 18 May	Jin Air	direct
21 May - 26 May	T'way Air	direct
11 May - 15 May	Korean Air	direct
19 May - 21 May	Korean Air	direct
07 May - 14 May	Jin Air	direct
29 May - 01 Jun	Korean Air	direct
27 May - 03 Jun	Korean Air	direct
30 May - 03 Jun	Korean Air	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 $176

Return flights