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

Return flights

03 Dec - 10 Dec	Air Canada
08 Dec - 15 Dec	Singapore Airlines
01 Dec - 11 Dec	Cathay Pacific
01 Dec - 08 Dec	Cathay Pacific
04 Dec - 16 Dec	Cathay Pacific
02 Dec - 16 Dec	Cathay Pacific
10 Dec - 17 Dec	Alaska Airlines
07 Dec - 17 Dec	Cathay Pacific
08 Dec - 19 Dec	Singapore Airlines
30 Dec - 18 Jan	Xiamen Airlines
09 Dec - 14 Dec	Singapore Airlines
11 Dec - 31 Jan	Air Canada
26 Dec - 08 Jan	Air Canada
26 Dec - 09 Jan	Air Canada
25 Dec - 12 Jan	Air Canada
21 Dec - 04 Jan	Zipair
13 Dec - 04 Jan	WestJet
13 Dec - 15 Jan	Air Canada
17 Dec - 11 Jan	Zipair
16 Dec - 11 Jan	Zipair

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 $743

Return flights