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

Return flights

08 Dec - 15 Dec	Frontier Airlines
04 Dec - 11 Dec	Spirit Airlines
29 Dec - 28 Jan	Turkish Airlines
04 Dec - 18 Dec	WestJet
29 Dec - 16 Jan	Turkish Airlines
31 Dec - 28 Jan	Turkish Airlines
07 Dec - 13 Dec	WestJet
08 Dec - 22 Dec	Frontier Airlines
06 Dec - 12 Jan	WestJet
15 Dec - 09 Jan	Frontier Airlines
23 Dec - 09 Jan	Frontier Airlines
11 Dec - 23 Dec	WestJet
08 Dec - 23 Dec	Frontier Airlines
08 Dec - 12 Jan	Frontier Airlines
30 Dec - 08 Jan	Turkish Airlines
29 Dec - 08 Jan	Turkish Airlines
24 Dec - 29 Dec	Frontier Airlines
25 Dec - 11 Jan	Spirit Airlines
12 Dec - 23 Dec	Frontier Airlines
11 Dec - 31 Dec	WestJet

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

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 December from $1047

Return flights