Cheapest return flights from Washington to San Juan in May from 180€

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

Return flights

01 May - 03 May Frontier Airlines
16 May - 19 May Frontier Airlines
14 May - 19 May Frontier Airlines
12 May - 19 May Frontier Airlines
14 May - 16 May Frontier Airlines
04 May - 06 May Frontier Airlines
01 May - 05 May Frontier Airlines
15 May - 16 May Frontier Airlines
06 May - 13 May Frontier Airlines
07 May - 12 May Frontier Airlines
28 May - 02 Jun Frontier Airlines
29 May - 04 Jun Frontier Airlines
30 May - 03 Jun Frontier Airlines
27 May - 04 Jun Frontier Airlines
27 May - 02 Jun Frontier Airlines
29 May - 01 Jun Frontier Airlines
20 May - 01 Jun Frontier Airlines
30 May - 01 Jun Frontier Airlines
30 May - 03 Jun United direct
28 May - 02 Jun United direct

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

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