Cheapest return flights from Chicago to Seoul in September from 675€

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

Return flights

18 Sep - 24 Sep Cathay Pacific
08 Sep - 15 Sep Cathay Pacific
11 Sep - 16 Sep Cathay Pacific
17 Sep - 22 Sep Cathay Pacific
06 Sep - 14 Sep Cathay Pacific
03 Sep - 11 Sep Cathay Pacific
12 Sep - 18 Sep Cathay Pacific
10 Sep - 30 Sep WestJet
23 Sep - 30 Sep WestJet
27 Sep - 11 Oct WestJet
21 Sep - 27 Sep Cathay Pacific
26 Sep - 12 Oct Cathay Pacific
27 Sep - 11 Oct Delta direct
26 Sep - 12 Oct Delta direct

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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