AirHint found the following cheapest one-way flights from Washington (IAD) to San Juan (SJU) in June 2026 (see full year).
One-Way flights
| 07 Jun | Frontier Airlines | ||
| 17 Jun | Frontier Airlines | ||
| 21 Jun | Frontier Airlines | ||
| 19 Jun | Frontier Airlines | ||
| 26 Jun | United | direct | |
| 07 Jun | United | direct | |
| 18 Jun | Frontier Airlines | ||
| 18 Jun | United | direct |
Also check the deals for return flights from Washington to San Juan in June.
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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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