Cheapest return flights from Washington to San Juan in July from $159

Best time to book flights for Washington (IAD) to San Juan (SJU) flights at AirHint

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

Return flights

06 Jul - 10 Jul Frontier Airlines direct
08 Jul - 15 Jul Frontier Airlines direct
13 Jul - 17 Jul Frontier Airlines direct
06 Jul - 13 Jul Frontier Airlines direct
29 Jul - 05 Aug Frontier Airlines direct
17 Jul - 22 Jul Frontier Airlines direct
24 Jul - 29 Jul Frontier Airlines direct
01 Jul - 05 Jul Frontier Airlines
10 Jul - 15 Jul Frontier Airlines direct
08 Jul - 14 Jul Frontier Airlines
03 Jul - 08 Jul Frontier Airlines direct
23 Jul - 06 Aug United
20 Jul - 03 Aug United direct
19 Jul - 02 Aug United direct
21 Jul - 04 Aug United direct
24 Jul - 07 Aug United
30 Jul - 13 Aug United
29 Jul - 12 Aug United
31 Jul - 14 Aug United
25 Jul - 08 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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