Cheapest return flights from Washington to Seoul in April from $1471

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

Return flights

12 Apr - 17 Apr Alaska Airlines
27 Apr - 11 May ANA
18 Apr - 27 Apr ANA
09 Apr - 23 Apr ANA
14 Apr - 25 Apr ANA
14 Apr - 17 Apr Air China
10 Apr - 25 Apr ANA
05 Apr - 08 May ANA
03 Apr - 18 Apr Finnair
25 Apr - 16 May ANA
29 Apr - 20 May ANA
18 Apr - 26 Apr ANA
10 Apr - 26 Apr ANA
11 Apr - 26 Apr ANA
23 Apr - 03 May ANA
04 Apr - 08 May ANA
15 Apr - 23 May ANA

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

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