AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Seoul (ICN) in September 2025 (see full year).

Return flights

01 Sep - 11 Sep	Cathay Pacific
08 Sep - 15 Sep	Cathay Pacific
04 Sep - 15 Sep	Cathay Pacific
01 Sep - 14 Sep	Cathay Pacific
01 Sep - 07 Sep	Cathay Pacific
25 Sep - 31 Oct	Cathay Pacific
13 Sep - 20 Sep	Cathay Pacific
13 Sep - 17 Sep	Cathay Pacific
28 Sep - 05 Oct	United
07 Sep - 14 Sep	United
01 Sep - 06 Sep	United
27 Sep - 17 Oct	United
11 Sep - 15 Sep	United
29 Sep - 20 Oct	United
14 Sep - 05 Oct	United
14 Sep - 08 Oct	United
05 Sep - 03 Oct	United
28 Sep - 01 Oct	Spirit Airlines
29 Sep - 20 Oct	Delta	direct
28 Sep - 05 Oct	Delta	direct

Also check the deals for one-way flights from Dallas-Fort Worth to Seoul in September.

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 Dallas-Fort Worth to Seoul in September from 657€

Return flights