Cheapest one-way flights from Washington to San Juan in March from 140€

AirHint found the following cheapest one-way flights from Washington (IAD) to San Juan (SJU) in March 2026 (see full year).

One-Way flights

30 Mar Allegiant Air
27 Mar Allegiant Air
23 Mar Frontier Airlines
24 Mar Delta
21 Mar Frontier Airlines direct
23 Mar United direct
31 Mar Frontier Airlines
29 Mar Allegiant Air
24 Mar United direct
26 Mar Southern Airways Express

Also check the deals for return flights from Washington to San Juan in March.

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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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