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

Return flights

26 Dec - 18 Jan	Xiamen Airlines
31 Dec - 14 Jan	Air Canada
09 Dec - 16 Dec	Air Canada
07 Dec - 16 Jan	Air Canada
03 Dec - 31 Dec	Air Premia	direct
07 Dec - 18 Jan	Air Canada
26 Dec - 12 Jan	Air Canada
04 Dec - 10 Dec	Cathay Pacific
26 Dec - 09 Jan	Air Canada
11 Dec - 09 Jan	Air Canada
05 Dec - 14 Dec	Alaska Airlines
26 Dec - 10 Jan	Air Canada
12 Dec - 11 Jan	Air Canada
13 Dec - 27 Dec	Air Canada
05 Dec - 14 Dec	Air Premia	direct
10 Dec - 22 Dec	Air Premia	direct
31 Dec - 14 Jan	Air Premia	direct
01 Dec - 31 Dec	Aer Lingus
14 Dec - 28 Dec	Norse Atlantic Airways (UK)
13 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 818€

Return flights