AirHint found the following cheapest one-way flights from Washington (IAD) to San Jose (SJO) in July 2026 (see full year).
One-Way flights
| 18 Jul | Frontier Airlines | ||
| 19 Jul | Copa | ||
| 20 Jul | Copa | ||
| 21 Jul | Copa | ||
| 24 Jul | Copa | ||
| 25 Jul | Copa | ||
| 26 Jul | Copa | ||
| 27 Jul | Copa | ||
| 28 Jul | Copa | ||
| 30 Jul | Copa |
Also check the deals for return flights from Washington to San Jose in July.
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