AirHint found the following cheapest return flights from Washington (IAD) to San Juan (SJU) in May 2026 (see full year).
Return flights
| 01 May - 06 May | United | direct | |
| 11 May - 14 May | United | ||
| 01 May - 01 Jun | United | direct | |
| 05 May - 17 May | United | ||
| 17 May - 23 May | United |
Also check the deals for one-way flights from Washington to San Juan 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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