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

One-Way flights

19 May	Etihad Airways
29 May	Etihad Airways
16 May	Etihad Airways
02 May	MIAT Mongolian Airlines
24 May	China Southern
01 May	Qatar Airways
01 May	Turkish Airlines	direct
26 May	Turkish Airlines	direct
29 May	Turkish Airlines	direct
16 May	Turkish Airlines	direct

Also check the deals for return flights from Seoul to Istanbul 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 one-way flights from Seoul to Istanbul in May from 262€

One-Way flights