JetBlue Airways Seat Upgrade policy offer a great deal for their passenger to upgrade their seat from economy class to business class, JetBlue Mint, or any other upper class. The most popular option among passengers is the JetBlue Mint class due to its spacious cabin and affordability than any other 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.