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

Return flights

10 Dec - 24 Dec	Air Canada
29 Dec - 19 Jan	Air Canada
28 Dec - 08 Jan	Air Canada
27 Dec - 15 Jan	Air Canada
03 Dec - 09 Dec	Air Canada
06 Dec - 20 Dec	Air Canada
12 Dec - 27 Dec	Air Canada
27 Dec - 11 Jan	Air Canada
31 Dec - 07 Jan	Air Canada
10 Dec - 07 Jan	Air Canada
16 Dec - 21 Jan	Air Premia	direct
10 Dec - 24 Dec	Air Premia	direct
06 Dec - 20 Dec	Air Premia	direct
03 Dec - 09 Dec	Air Premia	direct
22 Dec - 29 Dec	Air Premia	direct
23 Dec - 17 Jan	Air Canada
23 Dec - 08 Jan	Air Canada
17 Dec - 24 Dec	Spirit Airlines
18 Dec - 30 Dec	Air Premia	direct
27 Dec - 15 Jan	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 829€

Return flights