How Can I Upgrade my Seat on JetBlue Airways?

JetBlue airways offer a great deal for their passenger to upgrade their seat from economy class to business class, JetBlue upgrade to Mint, or any other upper class. However, upgrades will be done according to the customer preference, for instance, if they want to move to business class then can easily upgrade their seat on the airline. So if you are making your reservation with JetBlue airlines then this information is going to be useful for you.