Cheapest one-way flights from San Juan to Washington in March from $110

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

One-Way flights

07 Mar Frontier Airlines
18 Mar Spirit Airlines
10 Mar Frontier Airlines
29 Mar Spirit Airlines
01 Mar Frontier Airlines
25 Mar United direct
13 Mar Spirit Airlines
30 Mar Spirit Airlines
07 Mar Frontier Airlines direct
17 Mar Frontier Airlines

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