Cheapest one-way flights from Washington to San Juan in April from $140

Best time to book flights for Washington (IAD) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest one-way flights from Washington (IAD) to San Juan (SJU) in April 2025 (see full year).

One-Way flights

15 Apr Frontier Airlines
16 Apr Frontier Airlines
09 Apr Frontier Airlines
01 Apr Frontier Airlines
29 Apr United direct
19 Apr Frontier Airlines
19 Apr United direct
13 Apr United direct
12 Apr Air Canada
03 Apr Frontier Airlines

Also check the deals for return 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.

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