AirHint found the following cheapest one-way flights from Boston (BOS) to San Juan (SJU) in February 2026 (see full year).

One-Way flights

07 Feb	Spirit Airlines	direct
04 Feb	Spirit Airlines	direct
02 Feb	Spirit Airlines
11 Feb	Spirit Airlines	direct
18 Feb	Spirit Airlines
19 Feb	Spirit Airlines
21 Feb	United
06 Feb	Spirit Airlines
06 Feb	Spirit Airlines	direct
18 Feb	Spirit Airlines	direct

Also check the deals for return flights from Boston to San Juan in February.

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 one-way flights from Boston to San Juan in February from 75€

One-Way flights