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

Return flights

04 Jul - 11 Jul	United
12 Jul - 18 Jul	United
01 Jul - 08 Jul	United
04 Jul - 13 Jul	United
04 Jul - 12 Jul	United
19 Jul - 24 Jul	United
04 Jul - 15 Jul	United
24 Jul - 28 Jul	United
08 Jul - 14 Jul	United
22 Jul - 27 Jul	United
24 Jul - 08 Aug	United	direct
31 Jul - 08 Aug	United	direct

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

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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Cheapest return flights from Washington to San Juan in July from 238€

Return flights