AirHint found the following cheapest one-way flights from Washington (IAD) to San Jose (SJO) in March 2026 (see full year).
One-Way flights
| 10 Mar | United | ||
| 30 Mar | United | ||
| 31 Mar | United | ||
| 01 Mar | United | ||
| 08 Mar | Avianca | ||
| 11 Mar | Avianca | ||
| 17 Mar | Avianca | ||
| 03 Mar | Avianca | ||
| 22 Mar | Avianca | ||
| 07 Mar | Avianca |
Also check the deals for return flights from Washington to San Jose in March.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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