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

Return flights

29 Dec - 16 Jan	Air Canada
01 Dec - 15 Dec	China Eastern
03 Dec - 08 Dec	China Eastern
05 Dec - 14 Dec	jetBlue
08 Dec - 22 Dec	Ethiopian Airlines
08 Dec - 15 Dec	jetBlue
08 Dec - 16 Dec	Turkish Airlines
04 Dec - 07 Dec	jetBlue
26 Dec - 20 Jan	Air Canada
10 Dec - 12 Jan	Air Canada
03 Dec - 24 Dec	Turkish Airlines
06 Dec - 13 Dec	Air Canada
10 Dec - 22 Jan	Air Canada
08 Dec - 12 Dec	Turkish Airlines
02 Dec - 06 Jan	Norse Atlantic Airways (UK)
11 Dec - 15 Jan	Air Canada
31 Dec - 07 Jan	Norse Atlantic Airways (UK)
11 Dec - 17 Jan	LOT
10 Dec - 18 Jan	Air Canada
17 Dec - 19 Jan	Air Canada

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 $784

Return flights