AirHint found the following cheapest return flights from San Salvador (SAL) to Washington (IAD) in April 2026 (see full year).
Return flights
| 01 Apr - 11 Apr | Frontier Airlines | direct | |
| 23 Apr - 26 May | Avianca | direct | |
| 23 Apr - 14 May | Avianca | direct | |
| 23 Apr - 20 May | Avianca | direct | |
| 01 Apr - 05 Apr | Frontier Airlines | direct |
Also check the deals for one-way flights from San Salvador to Washington in April.
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