Priority boarding primarily grants you the privilege of boarding the aircraft ahead of the general public, usually in the first or second group (Group 1/A). The most tangible benefit in 2026 is early access to overhead bin space, ensuring that your carry-on luggage stays directly above your seat rather than being "gate-checked" due to a full cabin. Depending on the airline, priority boarding may also be bundled with other perks like priority check-in counters and expedited security lanes (like TSA PreCheck or SkyPriority). For airlines with open seating, like Southwest, priority boarding (A1-A15) is essential for securing the best seats or those with extra legroom. It does not typically include extra baggage or free food, but it significantly reduces the "gate-side stress" of travel, allowing you to settle into your seat and prepare for the flight in a relaxed, unhurried manner while others are still queuing in the terminal.