Cheapest one-way flights from Washington (IAD) to San Juan (SJU), October

10 dates in October, from $ 109. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
24 Oct Frontier Airlines
17 Oct Frontier Airlines
29 Oct United
Direct Flight
25 Oct United
Direct Flight
26 Oct United
Direct Flight
21 Oct Frontier Airlines
19 Oct Frontier Airlines
20 Oct Frontier Airlines
24 Oct United
Direct Flight
23 Oct Frontier Airlines
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Updated Oct 12, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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