Cheapest return IAD–SJU flights, July

AirHint found the following cheapest return flights from Washington (IAD) to San Juan (SJU) in July 2026 (see full year).

Return flights

22 Jul - 29 Jul Frontier Airlines
29 Jul - 12 Aug Frontier Airlines
29 Jul - 05 Aug Frontier Airlines
04 Jul - 15 Jul Frontier Airlines
25 Jul - 29 Jul Frontier Airlines
29 Jul - 03 Aug Frontier Airlines
13 Jul - 20 Jul Frontier Airlines
18 Jul - 29 Jul Frontier Airlines
22 Jul - 26 Jul Frontier Airlines
21 Jul - 29 Jul Frontier Airlines
27 Jul - 17 Aug Frontier Airlines
31 Jul - 07 Aug Frontier Airlines
31 Jul - 02 Aug Frontier Airlines
03 Jul - 14 Jul Frontier Airlines
08 Jul - 14 Jul Frontier Airlines
25 Jul - 28 Jul Frontier Airlines
26 Jul - 09 Aug Frontier Airlines
29 Jul - 05 Aug United direct
29 Jul - 12 Aug United direct
03 Jul - 08 Aug Frontier Airlines

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

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