Cheapest return flights from Washington to San Juan in July from $178

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

Return flights

07 Jul - 10 Jul Frontier Airlines
05 Jul - 11 Jul Frontier Airlines
05 Jul - 12 Jul Frontier Airlines
13 Jul - 17 Jul Frontier Airlines
12 Jul - 15 Jul Frontier Airlines
14 Jul - 17 Jul Frontier Airlines
06 Jul - 10 Jul Frontier Airlines
05 Jul - 10 Jul Frontier Airlines
04 Jul - 11 Jul Frontier Airlines
11 Jul - 18 Jul Frontier Airlines
24 Jul - 01 Aug Frontier Airlines
24 Jul - 02 Aug Frontier Airlines
28 Jul - 01 Aug Frontier Airlines
27 Jul - 01 Aug Frontier Airlines
20 Jul - 03 Aug Frontier Airlines
31 Jul - 05 Aug Frontier Airlines direct
20 Jul - 03 Aug Frontier Airlines direct
22 Jul - 05 Aug United
21 Jul - 04 Aug United direct
23 Jul - 06 Aug United

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

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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