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

Return flights

31 Dec - 19 Jan	Air Canada
08 Dec - 13 Dec	Air Canada
08 Dec - 12 Dec	Air Canada
28 Dec - 10 Jan	Air Canada
12 Dec - 09 Jan	Air Canada
11 Dec - 08 Jan	Air Canada
12 Dec - 07 Jan	Air Canada
14 Dec - 01 Jan	WestJet
24 Dec - 10 Jan	WestJet
25 Dec - 10 Jan	WestJet
13 Dec - 09 Jan	Finnair
23 Dec - 31 Dec	Finnair
22 Dec - 22 Jan	Air Canada
12 Dec - 31 Dec	Air France
23 Dec - 31 Dec	Korean Air	direct
12 Dec - 31 Dec	Korean Air	direct
08 Dec - 13 Dec	Delta	direct
08 Dec - 12 Dec	Delta	direct
14 Dec - 23 Dec	Korean Air	direct

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 $1126

Return flights