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

Return flights

26 Dec - 14 Jan	Air Canada
30 Dec - 08 Jan	Air Canada
26 Dec - 12 Jan	Air Canada
06 Dec - 08 Jan	Air Canada
26 Dec - 18 Jan	Air Canada
26 Dec - 17 Jan	Air Canada
07 Dec - 29 Dec	Air Canada
09 Dec - 15 Dec	Air Canada
10 Dec - 15 Jan	Air Canada
09 Dec - 20 Jan	Air Canada
08 Dec - 15 Dec	Air Canada
26 Dec - 10 Jan	Air Canada
28 Dec - 24 Jan	Air Canada
02 Dec - 16 Dec	Air Canada
06 Dec - 14 Dec	Air Canada
02 Dec - 19 Dec	Turkish Airlines
04 Dec - 13 Dec	Air Canada
03 Dec - 31 Dec	Turkish Airlines
15 Dec - 18 Dec	Air Canada
04 Dec - 13 Dec	Air Premia	direct

Also check the deals for one-way flights from Newark 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 Newark to Seoul in December from 757€

Return flights