Cheapest return flights from Washington to San Juan in July from 310€

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

Return flights

24 Jul - 28 Jul Frontier Airlines
12 Jul - 18 Jul Frontier Airlines
17 Jul - 21 Jul Frontier Airlines
30 Jul - 02 Aug Frontier Airlines
29 Jul - 03 Aug Frontier Airlines
10 Jul - 14 Jul United direct
12 Jul - 18 Jul United direct
18 Jul - 21 Jul United direct
29 Jul - 02 Aug Frontier Airlines
18 Jul - 26 Jul United direct
09 Jul - 12 Jul Frontier Airlines
17 Jul - 21 Jul United direct
09 Jul - 13 Jul United

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

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