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

Return flights

21 Jun - 24 Jun	American Airlines
21 Jun - 25 Jun	Delta
30 Jun - 04 Jul	Delta
25 Jun - 27 Jun	United
20 Jun - 24 Jun	American Airlines
23 Jun - 02 Jul	United
22 Jun - 26 Jun	United
28 Jun - 05 Jul	jetBlue
25 Jun - 09 Jul	United
22 Jun - 25 Jun	American Airlines
29 Jun - 03 Jul	United
30 Jun - 14 Jul	United
20 Jun - 25 Jun	United
19 Jun - 26 Jun	United
28 Jun - 03 Jul	United
23 Jun - 28 Jun	Southwest Airlines
21 Jun - 05 Jul	United
20 Jun - 27 Jun	United
19 Jun - 03 Jul	United
26 Jun - 10 Jul	United

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

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 June from $215

Return flights