AirHint found the following cheapest return flights from Chicago (ORD) to Seoul (ICN) in December 2026 (see full year).

Return flights

01 Dec - 31 Dec	EVA Air
22 Dec - 19 Jan	Lufthansa
20 Dec - 11 Jan	Lufthansa
23 Dec - 09 Jan	Lufthansa
19 Dec - 10 Jan	Air Serbia
01 Dec - 31 Dec	Delta	direct
19 Dec - 26 Dec	Air Canada
19 Dec - 10 Jan	Korean Air	direct
22 Dec - 19 Jan	Korean Air	direct
20 Dec - 11 Jan	Korean Air	direct
17 Dec - 31 Dec	Air Canada
19 Dec - 26 Dec	Korean Air	direct
23 Dec - 09 Jan	Korean Air	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 $1086

Return flights