Cheapest return flights from Chicago to Seoul in September from 622€

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

Return flights

04 Sep - 10 Sep Cathay Pacific
01 Sep - 17 Sep Cathay Pacific
01 Sep - 08 Sep Cathay Pacific
17 Sep - 24 Sep Cathay Pacific
01 Sep - 15 Sep Cathay Pacific
10 Sep - 16 Sep Cathay Pacific
20 Sep - 24 Sep Cathay Pacific
13 Sep - 27 Sep Cathay Pacific
30 Sep - 07 Oct Spirit Airlines
21 Sep - 24 Sep Frontier Airlines
27 Sep - 04 Oct Spirit Airlines
20 Sep - 23 Sep Air Canada
30 Sep - 07 Oct Delta direct
27 Sep - 04 Oct Delta direct
20 Sep - 03 Oct Delta

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

Skyscanner

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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