I remember wondering about this after I finally earned Mosaic status and started flying JetBlue more often. From my experience, Mosaic members don’t get automatic Mint upgrades, but they can upgrade when Mint seats are available, either by paying, bidding, or occasionally seeing an offer pop up closer to departure. I actually upgraded to Mint once after booking when the price dropped, and it made a long flight way more comfortable. On that same trip, my return plans changed last minute, 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 sorted without stress.
