AirHint found the following cheapest return flights from Windsor Locks (BDL) to San Juan (SJU) in September 2025 (see full year).

Return flights

23 Sep - 27 Sep	jetBlue	direct
27 Sep - 03 Oct	jetBlue	direct
23 Sep - 30 Sep	jetBlue
26 Sep - 28 Sep	jetBlue
26 Sep - 29 Sep	jetBlue
22 Sep - 29 Sep	jetBlue
25 Sep - 28 Sep	jetBlue
27 Sep - 30 Sep	jetBlue
23 Sep - 28 Sep	jetBlue
27 Sep - 18 Oct	jetBlue
23 Sep - 29 Sep	jetBlue
15 Sep - 19 Sep	jetBlue

Also check the deals for one-way flights from Windsor Locks to San Juan in September.

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 Windsor Locks to San Juan in September from $212

Return flights