AirHint found the following cheapest return flights from Washington (IAD) to San Jose (SJO) in April 2026 (see full year).
Return flights
| 15 Apr - 24 Apr | United | ||
| 15 Apr - 21 Apr | Avianca | ||
| 17 Apr - 20 Apr | Avianca | ||
| 19 Apr - 26 Apr | Copa | ||
| 01 Apr - 08 Apr | Avianca | ||
| 12 Apr - 18 Apr | Avianca | ||
| 19 Apr - 26 Apr | United | direct | |
| 04 Apr - 11 Apr | Copa |
Also check the deals for one-way flights from Washington to San Jose in April.
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