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

Return flights

28 Dec - 09 Jan	Air Canada
10 Dec - 17 Dec	Air Canada
12 Dec - 09 Jan	Air Canada
08 Dec - 27 Dec	Air Canada
05 Dec - 26 Dec	Air Canada
01 Dec - 15 Dec	Air Canada
08 Dec - 01 Jan	Turkish Airlines
07 Dec - 01 Jan	Turkish Airlines
11 Dec - 01 Jan	Turkish Airlines
08 Dec - 06 Jan	Air Canada
22 Dec - 09 Jan	Air Canada
23 Dec - 19 Jan	Air Canada
21 Dec - 11 Jan	Air Canada
23 Dec - 26 Dec	Air Canada
21 Dec - 09 Jan	Air Canada
16 Dec - 23 Dec	LOT
20 Dec - 30 Dec	Air Canada
22 Dec - 31 Dec	Lufthansa
17 Dec - 31 Dec	Air France
10 Dec - 17 Dec	Delta	direct

Also check the deals for one-way flights from Chicago 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 Chicago to Seoul in December from 830€

Return flights