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

Return flights

13 Dec - 31 Dec	United
16 Dec - 07 Jan	Hawaiian Airlines
15 Dec - 10 Jan	Delta
13 Dec - 30 Dec	Hawaiian Airlines
16 Dec - 08 Jan	Delta
17 Dec - 08 Jan	Delta
17 Dec - 07 Jan	Delta
13 Dec - 06 Jan	United
16 Dec - 06 Jan	Korean Air
18 Dec - 07 Jan	Delta
21 Dec - 31 Dec	Korean Air
17 Dec - 06 Jan	Delta
17 Dec - 05 Jan	Delta
18 Dec - 31 Dec	United

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 $1292

Return flights