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

Return flights

07 Dec - 12 Dec	Alaska Airlines
07 Dec - 26 Dec	Turkish Airlines
09 Dec - 13 Dec	Turkish Airlines
04 Dec - 07 Jan	Cathay Pacific
27 Dec - 17 Jan	Air Canada
11 Dec - 09 Jan	Ethiopian Airlines
26 Dec - 10 Jan	Air Canada
26 Dec - 09 Jan	Air Canada
30 Dec - 07 Jan	Air Canada
07 Dec - 26 Dec	Air Premia	direct
30 Dec - 13 Jan	Air Canada
09 Dec - 13 Dec	Air Premia	direct
28 Dec - 01 Jan	Air Canada
12 Dec - 19 Dec	Air Canada
12 Dec - 16 Jan	Air Canada
23 Dec - 31 Dec	Frontier Airlines
24 Dec - 07 Jan	Finnair
16 Dec - 31 Dec	Finnair
14 Dec - 20 Dec	Aer Lingus
22 Dec - 27 Dec	Air Premia	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 $965

Return flights