How does the United upgrade waitlist work? United Airlines prioritizes passenger upgrade waitlists based on their elite status level, such as members of global service given first priority for a seat upgrade, subsequently members with plus points and MileagePlus awards, and then passengers depending upon their premier status or fare class. Further, the United MileagePlus upgrade waitlist could be proceeded until three hours before the departure. For further insights about this, visit the United Airlines official website or check out the blog linked above. Read more: https://tinyurl.com/United-Upgrade-Waitlist #unitedupgradewaitlist #unitedseatupgrade