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

Return flights

28 Sep - 20 Oct	WestJet
29 Sep - 12 Oct	WestJet
27 Sep - 17 Oct	WestJet
27 Sep - 18 Oct	WestJet
15 Sep - 20 Oct	WestJet
16 Sep - 13 Oct	WestJet
16 Sep - 16 Oct	WestJet
22 Sep - 13 Oct	Spirit Airlines
14 Sep - 21 Sep	WestJet
25 Sep - 06 Oct	WestJet
15 Sep - 15 Oct	WestJet
15 Sep - 29 Sep	WestJet
19 Sep - 24 Sep	WestJet
15 Sep - 22 Sep	Spirit Airlines
17 Sep - 26 Sep	Spirit Airlines
11 Sep - 24 Sep	Spirit Airlines
11 Sep - 18 Sep	Spirit Airlines
20 Sep - 27 Sep	Frontier Airlines
11 Sep - 23 Sep	Frontier Airlines
19 Sep - 26 Sep	Spirit Airlines

Also check the deals for one-way flights from Atlanta 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 Atlanta to Seoul in September from 628€

Return flights