United will change its boarding process based on what the carrier calls a WILMA order — window seats first, followed by middle, then aisle. The change will begin Oct. 26, according to an internal memo reported in multiple media outlets.

There are no changes to preboarding or what have been Groups 1 through 3. What has been Group 4, which has included middle and aisle seat passengers, will be split into two boarding groups. Group 4 becomes middle seats only, while Group 5 becomes aisle seats only. In markets where United offers a basic economy fare with no full-size carry-ons, those passengers will move to a newly created Group 6.

According to the memo, the WILMA process saves up to two minutes of boarding time, based on testing at multiple airports. United says there has been a two-minute increase in boarding time since 2019.