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

Return flights

30 Jul - 22 Aug	Spirit Airlines
14 Jul - 24 Jul	Cathay Pacific
30 Jul - 06 Aug	Spirit Airlines
14 Jul - 21 Jul	Cathay Pacific
25 Jul - 28 Jul	Spirit Airlines
13 Jul - 20 Jul	Alaska Airlines
10 Jul - 12 Aug	Air Canada
20 Jul - 27 Jul	Spirit Airlines
23 Jul - 10 Aug	WestJet
11 Jul - 20 Jul	Cathay Pacific
27 Jul - 02 Aug	Spirit Airlines
13 Jul - 02 Aug	Frontier Airlines
27 Jul - 31 Jul	Air Canada
23 Jul - 28 Jul	Air Canada
23 Jul - 30 Jul	Air Canada
10 Jul - 30 Jul	Air Canada
10 Jul - 02 Aug	Cathay Pacific
25 Jul - 10 Aug	Air Canada
30 Jul - 22 Aug	Delta	direct
24 Jul - 02 Aug	Delta

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

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 July from $991

Return flights