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

Return flights

09 Dec - 29 Dec	United
10 Dec - 29 Dec	United
10 Dec - 30 Dec	United
13 Dec - 12 Jan	United
11 Dec - 30 Jan	United
13 Dec - 11 Jan	United
12 Dec - 12 Jan	United
10 Dec - 31 Dec	United
15 Dec - 09 Jan	United
24 Dec - 08 Jan	Allegiant Air
15 Dec - 11 Jan	Allegiant Air
23 Dec - 17 Jan	Delta
22 Dec - 10 Jan	WestJet
10 Dec - 05 Jan	Alaska Airlines
22 Dec - 31 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 779€

Return flights