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

Return flights

02 Oct - 11 Oct	WestJet
03 Oct - 19 Oct	Turkish Airlines
15 Oct - 25 Oct	Spirit Airlines
02 Oct - 06 Nov	WestJet
21 Oct - 09 Nov	Turkish Airlines
26 Oct - 05 Nov	Frontier Airlines
17 Oct - 07 Nov	WestJet
30 Oct - 19 Nov	Turkish Airlines
08 Oct - 12 Oct	Spirit Airlines
09 Oct - 16 Oct	WestJet
09 Oct - 19 Oct	American Airlines
30 Oct - 19 Nov	Delta	direct
02 Oct - 06 Nov	Delta	direct
21 Oct - 09 Nov	Delta	direct
04 Oct - 11 Oct	Delta	direct
09 Oct - 16 Oct	Delta	direct
17 Oct - 07 Nov	Delta	direct
08 Oct - 12 Oct	Delta	direct
09 Oct - 19 Oct	Korean Air	direct

Also check the deals for one-way flights from Atlanta to Seoul in October.

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 October from $909

Return flights