Cheapest return flights from Washington to San Juan in July from $321

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

Return flights

11 Jul - 15 Jul United direct
13 Jul - 18 Jul United direct
15 Jul - 29 Jul United
15 Jul - 22 Jul United direct
08 Jul - 14 Jul United direct
23 Jul - 30 Jul United direct
15 Jul - 20 Jul United direct
20 Jul - 03 Aug United
31 Jul - 09 Aug Breeze Airways
02 Jul - 06 Jul United direct
17 Jul - 19 Jul United direct
31 Jul - 09 Aug United direct

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

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