This special now run for limited time offer for JFK-STI $99 one way special:
Fine print:

Fine print:
*This fare is available on select dates between 8/20/15 and 11/8/15. Fare may not be available during holidays or other peak travel days. Click on the fare to see a fare calendar showing the exact dates this fare is available. Any "Price Drop" that is shown is based on lowest bookable fare within the last 72 hours. Fare is subject to availability; may not be available on all flights; may change without notice; must be purchased at time of reservation; and is one-way, nonstop, nonrefundable and nontransferable. Reservations made one week or more prior to a flight?s scheduled departure may be canceled without penalty up to 24 hours after the reservation is made. Fare includes government taxes and fees. Fare shown refers to the BLUE fare which does not include a checked bag. Fare does not include fees for oversized/overweight/extra baggage or other fees for products/services sold separately. To view baggage fees and other optional services and fees, click here. $25 fee per person applies to fares purchased by phone or at an airport or ticket office. Cancellations/changes must be made prior to scheduled departure (otherwise all money for fare is forfeited); change/cancel fee per person will apply (fees vary by fare option selected; for BLUE fares the fee is $70 (for fares up to $100) or $90 (for fares between $100 and $149.99) or $135 (for fares of $150 or more). For changes for all fare options, any difference in fare between new fare and existing one will apply. Cancellations receive JetBlue travel credit, valid for one year. Proper documentation required for boarding. Other restrictions apply.