AirHint found the following cheapest return flights from Seoul (ICN) to Muscat (MCT) in September 2025 (see full year).

Return flights

21 Sep - 28 Sep	Jeju Air
22 Sep - 27 Sep	Etihad Airways
23 Sep - 27 Sep	Etihad Airways
23 Sep - 25 Sep	Etihad Airways
17 Sep - 04 Oct	Etihad Airways
21 Sep - 27 Sep	Etihad Airways
20 Sep - 22 Sep	Etihad Airways
20 Sep - 23 Sep	Etihad Airways
26 Sep - 29 Sep	Etihad Airways
27 Sep - 29 Sep	Etihad Airways
20 Sep - 27 Sep	Etihad Airways

Also check the deals for one-way flights from Seoul to Muscat in September.

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 Seoul to Muscat in September from $583

Return flights