AirHint found the following cheapest return flights from New York (LGA) to Seoul (ICN) in December 2025 (see full year).

Return flights

27 Dec - 19 Jan	Air Canada
26 Dec - 10 Jan	Air Canada
15 Dec - 24 Dec	Air Canada
15 Dec - 19 Jan	Air Canada
24 Dec - 28 Dec	Delta
24 Dec - 17 Jan	Delta
29 Dec - 01 Jan	Delta
01 Dec - 01 Jan	Delta
02 Dec - 04 Dec	Korean Air
28 Dec - 01 Jan	Delta
30 Dec - 05 Jan	Air Canada
29 Dec - 05 Jan	Delta
28 Dec - 03 Jan	Air Canada
17 Dec - 24 Dec	Air Canada
14 Dec - 28 Dec	Air Canada
17 Dec - 30 Dec	Delta
18 Dec - 25 Dec	Delta
18 Dec - 24 Dec	Delta
19 Dec - 26 Dec	Air Canada

Also check the deals for one-way flights from New York 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 New York to Seoul in December from 901€

Return flights