Cheapest return flights from Washington to Seoul in April from $888

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

Return flights

07 Apr - 20 Apr Air China
22 Apr - 13 May Frontier Airlines
23 Apr - 03 May Frontier Airlines
06 Apr - 22 Apr Frontier Airlines
22 Apr - 17 May Alaska Airlines
29 Apr - 20 May Frontier Airlines
24 Apr - 06 May Frontier Airlines
13 Apr - 23 Apr Frontier Airlines
17 Apr - 23 Apr Air China
23 Apr - 11 May Alaska Airlines
14 Apr - 25 Apr Air China
16 Apr - 01 May Frontier Airlines
04 Apr - 18 Apr Frontier Airlines
02 Apr - 01 May Etihad Airways
11 Apr - 25 Apr Porter Airlines (Canada) Ltd
04 Apr - 11 Apr Frontier Airlines
06 Apr - 27 May Turkish Airlines
23 Apr - 23 May Turkish Airlines
01 Apr - 07 Apr Etihad Airways
05 Apr - 12 Apr Frontier Airlines

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

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