AirHint found the following cheapest return flights from Seoul (ICN) to Los Angeles (LAX) in December 2025 (see full year).

Return flights

22 Dec - 26 Dec	Alaska Airlines
04 Dec - 05 Dec	Air Premia	direct
10 Dec - 05 Jan	Air Premia	direct
11 Dec - 22 Jan	Air Premia	direct
11 Dec - 19 Jan	Air Premia	direct
22 Dec - 31 Dec	Alaska Airlines
16 Dec - 31 Dec	United
18 Dec - 30 Dec	United
18 Dec - 31 Dec	United
10 Dec - 31 Dec	United
16 Dec - 30 Dec	United
15 Dec - 30 Dec	United
15 Dec - 31 Dec	United
13 Dec - 05 Jan	United
14 Dec - 07 Jan	United
18 Dec - 06 Jan	United
17 Dec - 01 Jan	United
18 Dec - 01 Jan	United
11 Dec - 18 Jan	United
10 Dec - 29 Jan	United

Also check the deals for one-way flights from Seoul to Los Angeles 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 Seoul to Los Angeles in December from $407

Return flights