You might only board one group earlier?Priority Boarding is United's Group 2, while general Economy is 3 to 5, with Basic Economy waiting to the bitter end. Yes, you could pony up the extra cash for peace of mind (and in JetBlue's case, doing so comes with more seat space for your knees, which counts for something).

Boarding groups matter significantly because they dictate your access to overhead bin space and overall "settling time" on the aircraft. Most airlines prioritize groups based on loyalty status, ticket class (First/Business), and co-branded credit card ownership. If you are in a later group (such as Group 7 or 8 on American or Zone 5 on United), there is a high probability that the overhead bins will be full by the time you board, forcing you to "gate check" your carry-on bag. This can be a major inconvenience if you have a tight connection or fragile items. In 2026, many airlines have also begun strictly enforcing these groups with automated gate readers that "beep" or reject a boarding pass if a passenger tries to board before their group is called. Being in an early group essentially guarantees a stress-free boarding process and ensures your luggage stays with you in the cabin.