Cheapest return flights from Boston to San Juan in May from 94€

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 - 20 May Frontier Airlines direct
13 May - 20 May Frontier Airlines direct
08 May - 15 May Frontier Airlines
03 May - 10 May Frontier Airlines
18 May - 21 May Frontier Airlines
15 May - 20 May Frontier Airlines direct
04 May - 11 May Frontier Airlines direct
01 May - 04 May Frontier Airlines direct
06 May - 11 May Frontier Airlines direct
13 May - 18 May Frontier Airlines direct
13 May - 04 Jun Frontier Airlines
07 May - 04 Jun Spirit Airlines
07 May - 03 Jun Spirit Airlines
13 May - 02 Jun Frontier Airlines
21 May - 03 Jun Spirit Airlines
28 May - 03 Jun Spirit Airlines
20 May - 01 Jun Frontier Airlines
28 May - 01 Jun Spirit Airlines
21 May - 02 Jun Spirit Airlines
27 May - 04 Jun Frontier Airlines

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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