Cheapest return flights from Washington (IAD) to San Juan (SJU), August

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
03 Aug 07 Aug Frontier Airlines
03 Aug 10 Aug Frontier Airlines
24 Aug 29 Aug Frontier Airlines
21 Aug 25 Aug Frontier Airlines
05 Aug 12 Aug Frontier Airlines
15 Aug 20 Aug Frontier Airlines
14 Aug 20 Aug Frontier Airlines
16 Aug 20 Aug Frontier Airlines
17 Aug 23 Aug Frontier Airlines
21 Aug 28 Aug Frontier Airlines
28 Aug 01 Sep Frontier Airlines
14 Aug 01 Sep Frontier Airlines
28 Aug 01 Sep United
Direct Flight
26 Aug 01 Sep United
Direct Flight
30 Aug 07 Sep United
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deals for one-way flights from Washington to San Juan in August.

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Updated Jun 18, 2026.

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