Cheapest return flights from Boston to San Juan in May from 181€

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

Return flights

03 May - 10 May Frontier Airlines
12 May - 18 May Frontier Airlines
06 May - 11 May Frontier Airlines
08 May - 10 May Frontier Airlines
14 May - 18 May Frontier Airlines
08 May - 15 May Frontier Airlines
10 May - 15 May Frontier Airlines
11 May - 15 May Frontier Airlines
11 May - 16 May Frontier Airlines
12 May - 17 May Frontier Airlines
31 May - 03 Jun Spirit Airlines
31 May - 04 Jun Spirit Airlines
31 May - 10 Jun Spirit Airlines
13 May - 03 Jun Spirit Airlines
18 May - 03 Jun Spirit Airlines
18 May - 04 Jun Spirit Airlines
20 May - 03 Jun Spirit Airlines
20 May - 04 Jun Spirit Airlines
20 May - 10 Jun Spirit Airlines
31 May - 18 Jun Spirit Airlines

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

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