AirHint found the following cheapest one-way flights from Washington (DCA) to Seoul (ICN) in April 2026 (see full year).
One-Way flights
| 22 Apr | Air Canada | ||
| 24 Apr | Philippine Airlines | ||
| 30 Apr | Air Canada | ||
| 10 Apr | Air Canada | ||
| 01 Apr | Emirates |
Also check the deals for return flights from Washington to Seoul in April.
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