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

Return flights

29 Dec - 29 Jan	Delta
06 Dec - 20 Dec	Delta
14 Dec - 23 Dec	Delta
13 Dec - 23 Dec	Delta
18 Dec - 18 Jan	Delta
25 Dec - 05 Jan	Delta
28 Dec - 03 Jan	Delta
21 Dec - 01 Jan	Delta
19 Dec - 01 Jan	Delta
01 Dec - 12 Dec	WestJet
08 Dec - 19 Dec	WestJet
20 Dec - 31 Dec	KLM
17 Dec - 31 Dec	KLM
22 Dec - 18 Jan	KLM
28 Dec - 17 Jan	KLM
22 Dec - 08 Jan	KLM

Also check the deals for one-way flights from Dallas 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 Dallas to Seoul in December from 1233€

Return flights