Cheapest return flights from Boston to San Juan in May from $188

Best time to book flights for Boston (BOS) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to San Juan (SJU) in May 2025 (see full year).

Return flights

06 May - 11 May Spirit Airlines direct
06 May - 15 May Spirit Airlines direct
02 May - 18 May Spirit Airlines direct
03 May - 11 May Spirit Airlines direct
11 May - 18 May Frontier Airlines direct
11 May - 15 May Frontier Airlines direct
15 May - 18 May Frontier Airlines direct
02 May - 06 May Spirit Airlines direct
03 May - 06 May Spirit Airlines direct
08 May - 11 May Frontier Airlines direct
29 May - 02 Jun Spirit Airlines
30 May - 02 Jun Spirit Airlines
30 May - 03 Jun Spirit Airlines
29 May - 01 Jun jetBlue direct
30 May - 03 Jun jetBlue direct
30 May - 01 Jun jetBlue direct
30 May - 02 Jun jetBlue direct
28 May - 01 Jun Spirit Airlines
28 May - 01 Jun jetBlue direct
31 May - 03 Jun Delta direct

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

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in San Juan

Cheap car rent in San Juan