Cheapest return flights from Boston to San Juan in May from 160€

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

Return flights

02 May - 05 May Frontier Airlines
07 May - 12 May Frontier Airlines
09 May - 18 May Frontier Airlines
20 May - 30 May Frontier Airlines
14 May - 18 May Frontier Airlines
06 May - 14 May Spirit Airlines
04 May - 14 May Spirit Airlines
13 May - 14 May Spirit Airlines
09 May - 14 May Spirit Airlines
06 May - 10 May Frontier Airlines
31 May - 06 Jun United
18 May - 03 Jun Spirit Airlines
20 May - 03 Jun Spirit Airlines
14 May - 03 Jun Spirit Airlines
17 May - 03 Jun Spirit Airlines
23 May - 03 Jun Spirit Airlines
15 May - 03 Jun Spirit Airlines
24 May - 03 Jun Spirit Airlines
21 May - 03 Jun Spirit Airlines
22 May - 03 Jun Spirit Airlines

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

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