Upgrade Availability:  Jetblue Mint Upgrade are subject to availability and can vary based on the route, flight, and demand. Not all flights offer Mint as an option.Booking Mint: If you’re interested in flying in Mint class, you should consider booking a Mint fare directly when making your reservation. Mint fares typically include the upgraded experience from the start and can offer additional benefits like lie-flat seats, premium dining options, and more.