AirHint found the following cheapest one-way flights from Washington (IAD) to Seoul (ICN) in April 2026 (see full year).
One-Way flights
| 22 Apr | Turkish Airlines | ||
| 15 Apr | Turkish Airlines | ||
| 01 Apr | Etihad Airways | ||
| 26 Apr | Air Canada | ||
| 01 Apr | Korean Air | direct | |
| 22 Apr | Delta | direct | |
| 06 Apr | Delta | direct | |
| 15 Apr | Delta | direct | |
| 26 Apr | Delta | direct |
Also check the deals for return flights from Washington to Seoul in April.
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