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

Return flights

12 Sep - 19 Sep	China Eastern
03 Sep - 07 Sep	Air China
08 Sep - 12 Sep	Air China
11 Sep - 18 Sep	Cathay Pacific
08 Sep - 18 Sep	Cathay Pacific
11 Sep - 22 Sep	Cathay Pacific
01 Sep - 08 Sep	Cathay Pacific
09 Sep - 13 Sep	Etihad Airways
27 Sep - 11 Oct	Cathay Pacific
27 Sep - 10 Oct	Cathay Pacific
30 Sep - 09 Oct	Ethiopian Airlines

Also check the deals for one-way flights from Seoul to Riyadh 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 Riyadh in September from $406

Return flights