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

Return flights

05 May - 20 May	China Southern
02 May - 11 May	China Southern
05 May - 19 May	China Southern
24 May - 30 May	LOT
18 May - 30 May	LOT
19 May - 28 May	LOT
26 May - 04 Jun	LOT
23 May - 06 Jun	LOT
22 May - 30 May	LOT
25 May - 03 Jun	LOT
23 May - 30 May	LOT
16 May - 23 May	Etihad Airways
17 May - 30 May	LOT
23 May - 05 Jun	Qatar Airways
23 May - 05 Jun	Korean Air	direct
25 May - 03 Jun	Korean Air	direct
23 May - 06 Jun	Asiana Airlines	direct
26 May - 04 Jun	Asiana Airlines	direct

Also check the deals for one-way flights from Istanbul 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 Istanbul to Seoul in May from $589

Return flights