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

Return flights

26 Dec - 13 Jan	Air Canada
05 Dec - 14 Dec	Hawaiian Airlines
08 Dec - 13 Jan	Air Canada
09 Dec - 16 Dec	Air Canada
29 Dec - 12 Jan	Air Canada
28 Dec - 12 Jan	Air Canada
29 Dec - 13 Jan	Air Canada
07 Dec - 28 Dec	Air Canada
01 Dec - 10 Dec	Air Canada
10 Dec - 26 Dec	Air Canada
03 Dec - 10 Dec	Air Canada
05 Dec - 13 Dec	Air Canada
04 Dec - 10 Dec	Turkish Airlines
02 Dec - 05 Dec	Air Canada
27 Dec - 24 Jan	Air Canada
24 Dec - 28 Dec	Ethiopian Airlines
11 Dec - 12 Jan	Air Canada
27 Dec - 10 Jan	Air Canada
15 Dec - 16 Jan	Frontier Airlines
24 Dec - 15 Jan	Air Canada

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Newark to Seoul in December from 755€

Return flights