For modifying a flight of JetBlue Airlines, you can just call their customer services at +1 (844) 884-3555 to change your booking. The JetBlue Airlines Change Flight Policy grants the passengers an adjustment of flight without hassle. It does not charge any extra fees for changes up to 24 hours prior. This implies that there would be flexibility and ease in rescheduling when needed. However, fare differences or restrictions should be checked before the change so that you may freely shift to your new flight without running into trouble.