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

Return flights

24 Dec - 23 Jan	Ethiopian Airlines
06 Dec - 12 Dec	Frontier Airlines
29 Dec - 20 Jan	Air Canada
29 Dec - 26 Jan	Air Canada
06 Dec - 13 Dec	Alaska Airlines
26 Dec - 26 Jan	Air Canada
06 Dec - 08 Dec	Frontier Airlines
31 Dec - 17 Jan	Norse Atlantic Airways
08 Dec - 21 Dec	Ethiopian Airlines
07 Dec - 16 Dec	TAP
07 Dec - 17 Dec	Royal Air Maroc
06 Dec - 10 Dec	Alaska Airlines
07 Dec - 14 Dec	Lufthansa
31 Dec - 22 Jan	SWISS
27 Dec - 25 Jan	Air Canada
29 Dec - 19 Jan	Air Canada
12 Dec - 26 Jan	Xiamen Airlines
09 Dec - 16 Dec	Cathay Pacific
09 Dec - 15 Dec	Cathay Pacific
31 Dec - 15 Jan	SWISS

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 $897

Return flights