Re:Letting slower passengers board airplane first is faster,...
by sjg007 on Wednesday January 15, 2020 @09:02PM
(#22061021)
It's psuedo-random based on when you get your boarding pass (starting 24 hours). Essentially the quest for a non-middle seat conditional on distance to the front door.
Once you start boarding, each person can sit in any seat that s/he wants.