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

Return flights

08 Sep - 15 Sep	Frontier Airlines
04 Sep - 21 Sep	WestJet
08 Sep - 17 Sep	WestJet
29 Sep - 08 Oct	Frontier Airlines
13 Sep - 18 Sep	Frontier Airlines
17 Sep - 21 Oct	WestJet
15 Sep - 29 Sep	WestJet
13 Sep - 28 Sep	Frontier Airlines
23 Sep - 15 Oct	Frontier Airlines
23 Sep - 21 Oct	Frontier Airlines
21 Sep - 22 Sep	Spirit Airlines
15 Sep - 29 Sep	Delta	direct
08 Sep - 17 Sep	Delta	direct
23 Sep - 21 Oct	Delta	direct
23 Sep - 15 Oct	Delta	direct
17 Sep - 21 Oct	Delta	direct
08 Sep - 15 Sep	Delta	direct
29 Sep - 08 Oct	Delta	direct

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Las Vegas to Seoul in September from 683€

Return flights