Cheapest one-way flights from Washington to San Juan in August from 89€

AirHint found the following cheapest one-way flights from Washington (IAD) to San Juan (SJU) in August 2025 (see full year).

One-Way flights

28 Aug Frontier Airlines
24 Aug Delta
31 Aug United direct
19 Aug Delta
21 Aug Frontier Airlines
23 Aug Frontier Airlines
26 Aug United direct
22 Aug Frontier Airlines
24 Aug Frontier Airlines direct
23 Aug Frontier Airlines direct

Also check the deals for return flights from Washington to San Juan in August.

Skyscanner

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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