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

Return flights

05 Dec - 08 Dec	Delta
05 Dec - 13 Dec	Delta
09 Dec - 25 Dec	Hawaiian Airlines
15 Dec - 13 Jan	Korean Air
15 Dec - 29 Dec	Korean Air
22 Dec - 18 Jan	Korean Air
10 Dec - 10 Jan	Alaska Airlines
15 Dec - 12 Jan	Korean Air
16 Dec - 10 Jan	Delta
18 Dec - 21 Dec	Alaska Airlines
16 Dec - 08 Jan	Korean Air
16 Dec - 07 Jan	Korean Air
17 Dec - 07 Jan	Spirit Airlines
02 Dec - 03 Jan	Hawaiian Airlines
21 Dec - 08 Jan	Delta
20 Dec - 31 Dec	Delta

Also check the deals for one-way flights from Austin 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 Austin to Seoul in December from $866

Return flights