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

Return flights

11 Dec - 30 Jan	United
23 Dec - 16 Jan	Frontier Airlines
15 Dec - 29 Dec	United
21 Dec - 17 Jan	Frontier Airlines
24 Dec - 29 Dec	United
23 Dec - 27 Dec	Hawaiian Airlines
11 Dec - 11 Jan	United
10 Dec - 08 Jan	United
11 Dec - 08 Jan	United
25 Dec - 28 Dec	United
22 Dec - 17 Jan	Allegiant Air
21 Dec - 13 Jan	Frontier Airlines
22 Dec - 18 Jan	Allegiant Air
23 Dec - 10 Jan	Frontier Airlines
27 Dec - 30 Dec	Delta
24 Dec - 31 Dec	United
25 Dec - 30 Dec	United
25 Dec - 31 Dec	United
12 Dec - 31 Dec	United
23 Dec - 28 Dec	Delta

Also check the deals for one-way flights from Indianapolis 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 Indianapolis to Seoul in December from 869€

Return flights