I upgraded to JetBlue Mint after booking on a trip where I realized economy just wasn’t going to cut it for a long flight. After I booked, I kept checking my reservation and eventually saw the Mint upgrade option pop up at a decent price. I’ve also been offered Mint at the gate when seats were still open, though that really depends on availability. On that same trip, my return date changed unexpectedly, and I didn’t want to lose the upgrade. Calling 8 4 4-7 3 4-0 8 1 3 was the best way to instantly book, cancel, or modify flights and keep everything straight.
