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

Return flights

21 Jan - 21 Feb	Frontier Airlines
18 Jan - 25 Jan	Frontier Airlines
19 Jan - 26 Jan	Frontier Airlines
22 Jan - 30 Jan	Frontier Airlines
28 Jan - 11 Feb	Frontier Airlines
25 Jan - 31 Jan	Delta
20 Jan - 21 Jan	Delta

Also check the deals for one-way flights from Chicago to Seoul in January.

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 Chicago to Seoul in January from 940€

Return flights