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

Return flights

01 Dec - 10 Dec	United
30 Dec - 19 Jan	Air Canada
26 Dec - 19 Jan	Air Canada
13 Dec - 28 Dec	Air Canada
13 Dec - 10 Jan	Air Canada
05 Dec - 05 Jan	Spirit Airlines
08 Dec - 03 Jan	Spirit Airlines
23 Dec - 10 Jan	Hawaiian Airlines
24 Dec - 09 Jan	Lufthansa
22 Dec - 10 Jan	Hawaiian Airlines
23 Dec - 09 Jan	Lufthansa
23 Dec - 14 Jan	Lufthansa
14 Dec - 30 Dec	Air France
22 Dec - 29 Dec	Air France
19 Dec - 30 Dec	Air Canada
19 Dec - 26 Dec	United
14 Dec - 30 Dec	Korean Air	direct
22 Dec - 29 Dec	Korean Air	direct
19 Dec - 30 Dec	Korean Air	direct
19 Dec - 26 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 827€

Return flights