Cheapest one-way flights from Washington to San Juan in May from 89€

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

One-Way flights

16 May Frontier Airlines
18 May Frontier Airlines
28 May Frontier Airlines
19 May Frontier Airlines
20 May Frontier Airlines
15 May United direct
16 May United direct
26 May United direct
19 May United direct
18 May United direct

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

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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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