There are few things more frustrating when traveling by air than waiting patiently for your “zone” to be called at the gate, walking down the jetway like a boss, and then, inexplicably, being met by a sudden and immovable line in the plane’s narrow aisle.
“There must be a better way,” we have all said under our breaths.
Surprisingly, there is no standard boarding practice in commercial aviation. All the major airlines do their own thing, with back-to-front loading being the most popular.
Source : HuffingtonPost.Com