Using JetBlue Airways' same-day flight change service, you can change your flight the same day. You can change a JetBlue flight the same day by going to the airline's booking office or kiosk before the scheduled departure of your flight. You can chat with a jetblue flight change policy agent at the desk.Passengers can choose between an earlier or later flight on the same day.There are only journeys between permitted airports or adjacent city pairs. Cities having a single direct flight per day are not eligible for the option of a same-day change.If you want to know more you can read the full blog.