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

Return flights

02 Mar - 03 Mar	Spirit Airlines
01 Mar - 08 Mar	jetBlue	direct
10 Mar - 14 Mar	jetBlue	direct
01 Mar - 03 Mar	Spirit Airlines	direct
02 Mar - 03 Mar	Spirit Airlines	direct
15 Mar - 20 Mar	jetBlue	direct
14 Mar - 20 Mar	jetBlue	direct
15 Mar - 21 Mar	jetBlue	direct
14 Mar - 21 Mar	jetBlue	direct
17 Mar - 21 Mar	jetBlue	direct

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

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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Cheapest return flights from Boston to San Juan in March from $212

Return flights