AirHint found the following cheapest one-way flights from Washington (IAD) to San Jose (SJO) in May 2026 (see full year).
One-Way flights
| 29 May | United | ||
| 30 May | United | ||
| 13 May | United | ||
| 16 May | Avianca | ||
| 24 May | Avianca | ||
| 17 May | Avianca | ||
| 19 May | Avianca | ||
| 26 May | Avianca | ||
| 27 May | Avianca | ||
| 31 May | Avianca |
Also check the deals for return flights from Washington to San Jose in May.
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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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