Cheapest return flights from Boston to San Juan in May from 149€

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

Return flights

05 May - 07 May Frontier Airlines
09 May - 13 May Frontier Airlines
05 May - 12 May Frontier Airlines
05 May - 08 May Frontier Airlines
06 May - 12 May Frontier Airlines
09 May - 12 May Frontier Airlines
04 May - 12 May Frontier Airlines
15 May - 22 May Frontier Airlines
02 May - 15 May Frontier Airlines
03 May - 13 May Frontier Airlines
30 May - 05 Jun Spirit Airlines
29 May - 05 Jun Spirit Airlines
29 May - 06 Jun Spirit Airlines
29 May - 16 Jun Spirit Airlines
17 May - 05 Jun Spirit Airlines
17 May - 06 Jun Spirit Airlines
18 May - 05 Jun Spirit Airlines
18 May - 06 Jun Spirit Airlines
24 May - 05 Jun Spirit Airlines
24 May - 10 Jun Spirit Airlines

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

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