It's something you've probably never even considered.
from Inc.com http://www.inc.com/chris-matyszczyk/this-is-the-sneaky-way-airlines-make-a-lot-of-their-money-it-isnt-seat-sales-or-.html
from Inc.com http://www.inc.com/chris-matyszczyk/this-is-the-sneaky-way-airlines-make-a-lot-of-their-money-it-isnt-seat-sales-or-.html