I could be mistaken, but I recall reading that there are quite a few hoops to jump through before you can fly for the big boys. For example, you would typically

I could be mistaken, but I recall reading that there are quite a few hoops to jump through before you can fly for the big boys. For example, you would typically start with shorter/less important routes on smaller airlines. Also, the pilot unions keep the good routes (and salaries) for the more senior pilots, so tenure plays a big part in how much you get paid.