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

Return flights

04 Dec - 14 Dec	Air Canada
01 Dec - 09 Dec	Air Canada
03 Dec - 13 Dec	Air Canada
04 Dec - 13 Dec	Air Canada
27 Dec - 29 Jan	Air Canada
24 Dec - 30 Dec	WestJet
16 Dec - 26 Dec	Air Canada
24 Dec - 31 Dec	WestJet
23 Dec - 30 Dec	Frontier Airlines
30 Dec - 06 Jan	Frontier Airlines
22 Dec - 01 Jan	Frontier Airlines
20 Dec - 24 Dec	WestJet
19 Dec - 23 Dec	WestJet
27 Dec - 29 Jan	Delta	direct
30 Dec - 04 Jan	Hawaiian Airlines
20 Dec - 02 Jan	WestJet
14 Dec - 03 Jan	Delta

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 647€

Return flights