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

Return flights

04 Dec - 07 Jan	Cathay Pacific
01 Dec - 01 Jan	Xiamen Airlines
27 Dec - 19 Jan	Air Canada
15 Dec - 22 Dec	Finnair
24 Dec - 28 Dec	Finnair
15 Dec - 05 Jan	Finnair
15 Dec - 24 Dec	Finnair
14 Dec - 28 Dec	Finnair
23 Dec - 04 Jan	Finnair
22 Dec - 05 Jan	Finnair
17 Dec - 07 Jan	Finnair
25 Dec - 05 Jan	Finnair
10 Dec - 01 Jan	Finnair
24 Dec - 04 Jan	Finnair
17 Dec - 30 Dec	Finnair
20 Dec - 30 Dec	Finnair
18 Dec - 24 Dec	Finnair
02 Dec - 04 Dec	Delta	direct
24 Dec - 28 Dec	Delta	direct
15 Dec - 24 Dec	Asiana Airlines	direct

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 919€

Return flights