Cheapest return flights from Washington to San Juan in August from 190€

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

Return flights

28 Aug - 30 Aug Frontier Airlines
28 Aug - 31 Aug Frontier Airlines
18 Aug - 20 Aug United direct
24 Aug - 28 Aug Frontier Airlines direct
30 Aug - 04 Sep Frontier Airlines
25 Aug - 28 Aug Frontier Airlines
18 Aug - 29 Aug United direct
17 Aug - 21 Aug Frontier Airlines direct
21 Aug - 24 Aug Frontier Airlines direct
28 Aug - 04 Sep Frontier Airlines
25 Aug - 29 Aug United
26 Aug - 29 Aug United
22 Aug - 06 Sep Frontier Airlines
30 Aug - 03 Sep Frontier Airlines
31 Aug - 03 Sep Frontier Airlines
29 Aug - 05 Sep Frontier Airlines
29 Aug - 03 Sep Frontier Airlines
16 Aug - 01 Sep Frontier Airlines
23 Aug - 02 Sep Frontier Airlines
28 Aug - 01 Sep Frontier Airlines

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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