Zonal boarding will be begin February 1. It is similar to the current boarding process except note Zone 2 below.

Special needs guests think wheelchairs
Zone 1 Boarding = Priority Boarding for Summit, Ascent, Classic Plus and Stretch seats
Courtesy Boarding for families with infants and guests requiring extra time
Zone 2 Boarding = Guests with preferred seating behind Stretch and in front of exit seats
Express Boarding
Zone 3 Boarding = All remaining seats