The information provided here will be helpful if you are a JetBlue Airlines traveller who needs to change or Rebook their flight but is curious about how much it will cost to do so. The airline offers Blue and Blue Plus Prices, two different sorts of fares. The type of fare the passenger has purchased will also affect the cost of the change. So let's quickly review them: Red Fares: These are JetBlue Airlines' lowest priced fares with the most flexibility and freedom to change the trips. Only if the ticket is purchased seven days ahead to the intended departure date will the customers be able to simply change their flight. If you qualify, altering your flight won't cost you anything; however, the fee difference will apply if the airfare is higher than the one on your original ticket.