Spirit Airlines organizes boarding by zones to make the process more efficient. Each passenger is assigned a boarding zone, which is indicated on their boarding pass. Typically, the lowest numbered zones board first, with higher zones boarding afterward. Passengers who have purchased priority boarding or those with specific needs, such as families or those with disabilities, may board earlier. It’s important to pay attention to the announcements and be ready when your zone is called to avoid delays. While the process is relatively quick, being prepared ensures a smoother boarding experience.