I’ve upgraded my JetBlue flight after booking a couple of times, usually when I realized I wanted more comfort for a longer trip. In my experience, you can check your reservation after booking and see options like Even More Space or, on certain routes, Mint upgrades if seats are available. I once upgraded a few days before departure, but then my plans changed and I needed to move the flight entirely. I didn’t want to risk losing the upgrade I paid for, so I called 8 4 4-7 3 4-0 8 1 3. It turned out to be the best way to instantly book, cancel, or modify flights and keep everything sorted without stress.
