Cheapest return flights from Washington to San Juan in March from $168

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

Return flights

21 Mar - 25 Mar Frontier Airlines
02 Mar - 11 Mar Frontier Airlines
01 Mar - 07 Mar Frontier Airlines
01 Mar - 05 Mar Frontier Airlines
09 Mar - 11 Mar Frontier Airlines
02 Mar - 05 Mar Frontier Airlines
21 Mar - 24 Mar Frontier Airlines
23 Mar - 25 Mar Frontier Airlines
17 Mar - 24 Mar Frontier Airlines
01 Mar - 10 Mar Frontier Airlines
02 Mar - 02 Apr Frontier Airlines
31 Mar - 06 Apr Frontier Airlines
20 Mar - 01 Apr Frontier Airlines
27 Mar - 01 Apr Allegiant Air
26 Mar - 02 Apr Frontier Airlines
30 Mar - 06 Apr Frontier Airlines
30 Mar - 02 Apr Breeze Airways
27 Mar - 03 Apr Allegiant Air
31 Mar - 04 Apr Frontier Airlines
31 Mar - 03 Apr Frontier Airlines

Also check the deals for one-way flights from Washington to San Juan in March.

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