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

Return flights

01 Dec - 09 Dec	Ethiopian Airlines
02 Dec - 13 Dec	Norse Atlantic Airways (UK)
01 Dec - 07 Dec	Iberia
05 Dec - 12 Dec	Iberia
05 Dec - 14 Dec	Hawaiian Airlines
03 Dec - 09 Dec	Spirit Airlines
03 Dec - 10 Dec	Iberia
04 Dec - 11 Dec	Ethiopian Airlines
01 Dec - 05 Dec	Iberia
08 Dec - 24 Dec	Turkish Airlines
29 Dec - 25 Jan	Ethiopian Airlines
26 Dec - 26 Jan	Xiamen Airlines
31 Dec - 25 Jan	Turkish Airlines
24 Dec - 01 Jan	Ethiopian Airlines
09 Dec - 07 Jan	Iberia
29 Dec - 14 Jan	Finnair
28 Dec - 18 Jan	Finnair
15 Dec - 20 Jan	Finnair
16 Dec - 27 Jan	Finnair
16 Dec - 28 Jan	Finnair

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 748€

Return flights