Cheapest return flights from Washington to San Juan in August from 166€

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

Return flights

05 Aug - 07 Aug Frontier Airlines direct
17 Aug - 21 Aug Frontier Airlines direct
10 Aug - 14 Aug Frontier Airlines direct
17 Aug - 23 Aug Frontier Airlines direct
12 Aug - 17 Aug Frontier Airlines direct
07 Aug - 12 Aug Frontier Airlines direct
23 Aug - 29 Aug United
31 Aug - 04 Sep United
11 Aug - 14 Aug Frontier Airlines
09 Aug - 12 Aug Frontier Airlines
08 Aug - 12 Aug Frontier Airlines
27 Aug - 10 Sep United
24 Aug - 07 Sep United
25 Aug - 08 Sep United
26 Aug - 09 Sep United
23 Aug - 06 Sep United
31 Aug - 14 Sep United
30 Aug - 13 Sep United
29 Aug - 12 Sep United
28 Aug - 11 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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