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

Return flights

04 Sep - 26 Sep	WestJet
03 Sep - 25 Sep	WestJet
24 Sep - 06 Oct	WestJet
04 Sep - 27 Sep	WestJet
03 Sep - 27 Sep	WestJet
05 Sep - 26 Sep	WestJet
03 Sep - 21 Sep	WestJet
03 Sep - 26 Sep	WestJet
02 Sep - 21 Sep	Spirit Airlines
11 Sep - 18 Sep	Hawaiian Airlines
01 Sep - 15 Sep	Frontier Airlines
29 Sep - 05 Oct	Alaska Airlines
24 Sep - 06 Oct	Korean Air	direct
29 Sep - 05 Oct	Korean Air	direct
25 Sep - 02 Oct	Delta

Also check the deals for one-way flights from Las Vegas 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 Las Vegas to Seoul in September from 709€

Return flights