Cheapest return flights from Washington to Seoul in December from 822€

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

Return flights

03 Dec - 22 Dec Frontier Airlines
04 Dec - 13 Dec Alaska Airlines
01 Dec - 16 Dec TAP
31 Dec - 20 Jan Frontier Airlines
07 Dec - 10 Dec Alaska Airlines
31 Dec - 21 Jan Turkish Airlines
04 Dec - 10 Dec Turkish Airlines
02 Dec - 15 Dec Turkish Airlines
31 Dec - 07 Jan Turkish Airlines
25 Dec - 14 Jan Frontier Airlines
24 Dec - 27 Dec Frontier Airlines
14 Dec - 20 Dec Frontier Airlines
12 Dec - 20 Dec Frontier Airlines
13 Dec - 28 Dec Frontier Airlines
30 Dec - 06 Jan Turkish Airlines
09 Dec - 21 Jan Turkish Airlines
24 Dec - 21 Jan Air France
18 Dec - 15 Jan Allegiant Air
24 Dec - 01 Jan Frontier Airlines
19 Dec - 09 Jan Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Washington to Seoul in December.

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