Cheapest return flights from Boston to San Juan in May from $140

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

05 May - 09 May Spirit Airlines
03 May - 09 May Spirit Airlines
03 May - 08 May Spirit Airlines direct
02 May - 08 May Spirit Airlines direct
06 May - 15 May Spirit Airlines direct
06 May - 11 May Spirit Airlines direct
05 May - 08 May Spirit Airlines direct
04 May - 10 May Spirit Airlines
02 May - 10 May Spirit Airlines
16 May - 18 May Spirit Airlines
28 May - 03 Jun Delta direct
20 May - 10 Jun Delta direct
27 May - 01 Jun jetBlue
28 May - 01 Jun jetBlue
27 May - 01 Jun jetBlue direct
23 May - 01 Jun Spirit Airlines
28 May - 01 Jun jetBlue direct
23 May - 01 Jun jetBlue direct

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

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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.

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