Cheapest return flights from Washington to Seoul in April from $846

AirHint found the following cheapest return flights from Washington (IAD) to Seoul (ICN) in April 2026 (see full year).

Return flights

24 Apr - 03 May Frontier Airlines
24 Apr - 06 May Frontier Airlines
29 Apr - 13 May Frontier Airlines
23 Apr - 03 May Frontier Airlines
24 Apr - 08 May Frontier Airlines
30 Apr - 10 May Frontier Airlines
24 Apr - 13 May Frontier Airlines
10 Apr - 17 Apr Air China
24 Apr - 15 May Air China
26 Apr - 10 May Frontier Airlines
10 Apr - 15 May Air China
06 Apr - 22 Apr Frontier Airlines
13 Apr - 20 Apr Etihad Airways
06 Apr - 21 Apr Frontier Airlines
20 Apr - 24 Apr Frontier Airlines
07 Apr - 21 Apr Porter Airlines (Canada) Ltd
10 Apr - 18 Apr Frontier Airlines
04 Apr - 18 Apr Frontier Airlines
14 Apr - 25 Apr Air China
11 Apr - 25 Apr Porter Airlines (Canada) Ltd

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

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