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

Return flights

01 Dec - 09 Dec	China Eastern
01 Dec - 10 Dec	China Eastern
01 Dec - 08 Dec	Air China
01 Dec - 11 Dec	Air China
03 Dec - 16 Dec	China Eastern
04 Dec - 19 Dec	China Eastern
07 Dec - 16 Dec	Alaska Airlines
05 Dec - 13 Dec	Alaska Airlines
05 Dec - 28 Dec	Alaska Airlines
05 Dec - 21 Dec	Alaska Airlines
29 Dec - 25 Jan	Alaska Airlines
31 Dec - 23 Jan	Alaska Airlines
30 Dec - 15 Jan	Xiamen Airlines
28 Dec - 25 Jan	Xiamen Airlines
02 Dec - 10 Jan	WestJet
25 Dec - 13 Jan	Xiamen Airlines
24 Dec - 24 Jan	Alaska Airlines
31 Dec - 23 Jan	Air Premia	direct
13 Dec - 12 Jan	Alaska Airlines
28 Dec - 25 Jan	Air Premia	direct

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to Seoul in December from $651

Return flights