Save $28 and explore San Juan this winter. Shop Now at DealBase Tips On the DealBase landing page, click "Frontier Airlines" in the top line to see this sale; we found lower fares within. We found this price on flights departing from Tampa, FL (TPA) with arrival in San Juan, PR (SJU) on January 13. Book this travel deal by December 31 for travel through March 4. All prices, dates, and booking details were valid at the time of publication.