Cheapest return flights from Washington to San Juan in April from $390

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 April 2025 (see full year).

Return flights

27 Apr - 30 Apr Frontier Airlines
24 Apr - 30 Apr Frontier Airlines
26 Apr - 01 May Frontier Airlines
26 Apr - 03 May Frontier Airlines
30 Apr - 14 May United direct
24 Apr - 01 May Frontier Airlines
24 Apr - 02 May Frontier Airlines
30 Apr - 07 May American Airlines
28 Apr - 02 May Frontier Airlines
30 Apr - 07 May United direct
28 Apr - 12 May United direct
28 Apr - 07 May Delta
24 Apr - 28 Apr Frontier Airlines
26 Apr - 28 Apr Frontier Airlines
25 Apr - 30 Apr Frontier Airlines
27 Apr - 30 Apr United direct
27 Apr - 29 Apr United direct
21 Apr - 25 Apr Frontier Airlines
24 Apr - 27 Apr Frontier Airlines
25 Apr - 27 Apr Frontier Airlines

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

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan