Does anyone know if there is a cut off time before a flight where you wouldn’t be able to cancel and get a refund? I’m traveling with a short connection and the only flight going to my city if I miss my connection is a JetBlue one. I’m considering purchasing a refundable ticket, because even with the added expense I’d be happier to get home. However, I may not be in the position to make this call earlier than 1 hour before the flight.