AirHint found the following cheapest return flights from Washington (DCA) to San Jose (SJO) in April 2026 (see full year).
Return flights
| 03 Apr - 13 Apr | Southwest Airlines | ||
| 03 Apr - 14 Apr | Southwest Airlines | ||
| 03 Apr - 15 Apr | Southwest Airlines | ||
| 17 Apr - 20 Apr | United | ||
| 03 Apr - 11 Apr | United |
Also check the deals for one-way flights from Washington to San Jose in April.
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