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

Return flights

15 Sep - 20 Oct	WestJet
09 Sep - 23 Sep	WestJet
03 Sep - 09 Sep	WestJet
12 Sep - 10 Oct	WestJet
27 Sep - 13 Oct	WestJet
21 Sep - 09 Oct	WestJet
16 Sep - 23 Sep	WestJet
08 Sep - 27 Sep	WestJet
01 Sep - 29 Sep	WestJet
09 Sep - 01 Oct	WestJet
01 Sep - 06 Oct	WestJet
01 Sep - 27 Sep	WestJet
28 Sep - 05 Oct	WestJet
03 Sep - 01 Oct	WestJet
04 Sep - 04 Oct	WestJet
30 Sep - 13 Oct	Alaska Airlines
09 Sep - 12 Sep	Alaska Airlines
01 Sep - 12 Sep	Alaska Airlines
03 Sep - 05 Sep	Air Canada
16 Sep - 30 Sep	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 713€

Return flights