Cheapest return flights from Washington to San Juan in June from 178€

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

Return flights

02 Jun - 05 Jun Frontier Airlines
19 Jun - 21 Jun Frontier Airlines
12 Jun - 21 Jun Frontier Airlines
17 Jun - 25 Jun Frontier Airlines
14 Jun - 20 Jun Frontier Airlines
25 Jun - 29 Jun Frontier Airlines
08 Jun - 15 Jun Frontier Airlines
03 Jun - 07 Jun Frontier Airlines
14 Jun - 20 Jun United direct
24 Jun - 28 Jun Frontier Airlines
29 Jun - 03 Jul Frontier Airlines
30 Jun - 03 Jul Frontier Airlines
06 Jun - 05 Jul Frontier Airlines
28 Jun - 02 Jul United direct
28 Jun - 05 Jul Frontier Airlines
27 Jun - 05 Jul Frontier Airlines
30 Jun - 04 Jul Frontier Airlines

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

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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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