Needed to change a flight due to a family medical emergency. With documentation JetBlue offered to give a medical fee waiver. what I originally paid will be put in a JetBlue account. My question is if the new flight I book is less than the previous one I think they will just keep the difference in my account does that mean I have to use that amount within one year. In other words I originally paid 2400.00. The price of the airfare with the new date is 2000.00. So the 400.00 difference would be left in my account. Do I only have one year to use that? We don't travel that frequently so I am afraid I wouldn't use it within the year. Does anyone know the answer to this.