AirHint found the following cheapest return flights from Xi'an (XIY) to Seoul (ICN) in September 2025 (see full year).

Return flights

25 Sep - 06 Oct	Asiana Airlines	direct
30 Sep - 02 Oct	Asiana Airlines	direct
29 Sep - 11 Oct	Korean Air	direct
30 Sep - 08 Oct	Shandong Airlines
30 Sep - 06 Oct	Shandong Airlines
22 Sep - 06 Oct	Air China
22 Sep - 06 Oct	Korean Air	direct
26 Sep - 03 Oct	Air China
30 Sep - 06 Oct	Korean Air	direct
30 Sep - 03 Oct	China Southern

Also check the deals for one-way flights from Xi'an to Seoul 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 Xi'an to Seoul in September from 336€

Return flights