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

Return flights

12 Aug - 15 Aug	United
24 Aug - 28 Aug	Southwest Airlines
24 Aug - 27 Aug	Southwest Airlines
23 Aug - 29 Aug	Southwest Airlines
19 Aug - 28 Aug	United
17 Aug - 22 Aug	jetBlue
18 Aug - 23 Aug	jetBlue
26 Aug - 28 Aug	Southwest Airlines
12 Aug - 14 Aug	Southwest Airlines
10 Aug - 14 Aug	Southwest Airlines
30 Aug - 13 Sep	United
29 Aug - 05 Sep	Southwest Airlines
23 Aug - 06 Sep	United
28 Aug - 04 Sep	jetBlue
27 Aug - 10 Sep	United
22 Aug - 05 Sep	United
26 Aug - 09 Sep	United
31 Aug - 14 Sep	United
24 Aug - 07 Sep	United
20 Aug - 03 Sep	United

Also check the deals for one-way flights from Washington to San Juan in August.

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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Cheapest return flights from Washington to San Juan in August from 200€

Return flights