Cheapest return flights from Washington to San Juan in August from $184

Best time to book flights for Washington (IAD) to San Juan (SJU) flights at AirHint

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

Return flights

17 Aug - 23 Aug Frontier Airlines direct
24 Aug - 30 Aug Frontier Airlines direct
10 Aug - 14 Aug Frontier Airlines direct
17 Aug - 21 Aug Frontier Airlines direct
05 Aug - 14 Aug Frontier Airlines direct
12 Aug - 16 Aug Frontier Airlines
17 Aug - 24 Aug Frontier Airlines direct
14 Aug - 17 Aug Frontier Airlines direct
03 Aug - 10 Aug Frontier Airlines
14 Aug - 18 Aug Frontier Airlines
27 Aug - 10 Sep United
30 Aug - 01 Sep Frontier Airlines
28 Aug - 01 Sep Frontier Airlines
30 Aug - 13 Sep United direct
26 Aug - 09 Sep United
23 Aug - 06 Sep United direct
31 Aug - 14 Sep United direct
22 Aug - 05 Sep United
24 Aug - 07 Sep United direct
20 Aug - 03 Sep United

Also check the deals for one-way 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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