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

Return flights

02 Dec - 15 Dec	Hawaiian Airlines
10 Dec - 24 Dec	Alaska Airlines
10 Dec - 23 Dec	WestJet
10 Dec - 30 Dec	Air Canada
10 Dec - 25 Dec	Alaska Airlines
10 Dec - 31 Dec	Air Canada
11 Dec - 31 Dec	Air Canada
10 Dec - 29 Dec	Air Canada
12 Dec - 31 Dec	Flair Airlines
27 Dec - 12 Jan	Alaska Airlines
12 Dec - 29 Dec	Flair Airlines
10 Dec - 01 Jan	Air Canada
31 Dec - 07 Jan	Air Canada
27 Dec - 12 Jan	Korean Air	direct
26 Dec - 10 Jan	Korean Air	direct
13 Dec - 09 Jan	Alaska Airlines

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

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 December from $890

Return flights