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

Return flights

18 Aug - 27 Aug	WestJet
18 Aug - 25 Aug	WestJet
21 Aug - 04 Sep	Spirit Airlines
16 Aug - 24 Aug	WestJet
15 Aug - 30 Aug	Frontier Airlines
03 Aug - 20 Aug	WestJet
03 Aug - 10 Aug	WestJet
18 Aug - 27 Aug	Delta	direct
18 Aug - 25 Aug	Delta	direct
21 Aug - 04 Sep	Korean Air	direct
16 Aug - 24 Aug	Delta	direct
03 Aug - 20 Aug	Korean Air	direct

Also check the deals for one-way flights from Las Vegas to Seoul in August.

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 August from 718€

Return flights