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

Return flights

15 Apr - 22 Apr	Jin Air	direct
08 Apr - 15 Apr	Jin Air	direct
16 Apr - 21 Apr	Jin Air	direct
08 Apr - 14 Apr	Jin Air	direct
17 Apr - 21 Apr	Jin Air	direct
01 Apr - 06 Apr	Jin Air	direct
18 Apr - 21 Apr	Jin Air	direct
14 Apr - 16 Apr	Jin Air	direct
21 Apr - 23 Apr	Jin Air	direct
08 Apr - 09 Apr	Jin Air	direct
29 Apr - 04 May	Jin Air	direct
29 Apr - 01 May	Jin Air	direct
25 Apr - 02 May	T'way Air	direct

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

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 April from $156

Return flights