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

Return flights

03 Oct - 19 Oct	WestJet
16 Oct - 22 Oct	WestJet
13 Oct - 29 Oct	WestJet
02 Oct - 06 Nov	Frontier Airlines
01 Oct - 26 Nov	WestJet
25 Oct - 08 Nov	Frontier Airlines
01 Oct - 23 Oct	WestJet
11 Oct - 09 Nov	Spirit Airlines
10 Oct - 10 Nov	WestJet
11 Oct - 28 Oct	Spirit Airlines
07 Oct - 15 Oct	WestJet
09 Oct - 16 Oct	Frontier Airlines
01 Oct - 27 Nov	Alaska Airlines
22 Oct - 27 Oct	Alaska Airlines
18 Oct - 24 Oct	WestJet
01 Oct - 08 Oct	Spirit Airlines
18 Oct - 22 Nov	WestJet
01 Oct - 27 Nov	Korean Air	direct
25 Oct - 08 Nov	Delta	direct
10 Oct - 10 Nov	Delta	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 767€

Return flights