Cheapest return flights from Washington to San Juan in April from 164€

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

Return flights

30 Apr - 06 May Frontier Airlines
24 Apr - 26 Apr Frontier Airlines
30 Apr - 03 May Frontier Airlines
25 Apr - 09 May Frontier Airlines
24 Apr - 12 May Frontier Airlines
30 Apr - 04 May Frontier Airlines
20 Apr - 24 Apr Frontier Airlines
17 Apr - 24 Apr Frontier Airlines
17 Apr - 25 Apr Frontier Airlines
18 Apr - 26 Apr Frontier Airlines
28 Apr - 01 May Frontier Airlines
28 Apr - 06 May Frontier Airlines
28 Apr - 05 May Frontier Airlines
23 Apr - 30 Apr Allegiant Air
12 Apr - 17 Apr Frontier Airlines
18 Apr - 19 Apr Frontier Airlines
24 Apr - 28 Apr Frontier Airlines
29 Apr - 06 May Frontier Airlines
21 Apr - 24 Apr Frontier Airlines
29 Apr - 04 May Frontier Airlines

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

Powered by

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Feel free to contact us with any feedback or request another flight research.