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

Return flights

13 Sep - 21 Sep	WestJet
09 Sep - 21 Sep	WestJet
09 Sep - 23 Sep	WestJet
03 Sep - 18 Sep	WestJet
06 Sep - 19 Sep	WestJet
09 Sep - 31 Oct	WestJet
03 Sep - 09 Sep	WestJet
09 Sep - 16 Sep	WestJet
16 Sep - 19 Sep	WestJet
16 Sep - 20 Sep	WestJet
05 Sep - 21 Sep	WestJet
25 Sep - 20 Oct	Frontier Airlines
29 Sep - 13 Oct	WestJet
14 Sep - 05 Oct	WestJet
09 Sep - 01 Oct	WestJet
03 Sep - 01 Oct	WestJet
26 Sep - 03 Oct	Frontier Airlines
27 Sep - 04 Oct	Turkish Airlines
25 Sep - 20 Oct	Delta	direct
29 Sep - 13 Oct	Delta	direct

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 705€

Return flights