DOS Airline
Everybody pushes the airplane until it glides, then they jump on and let the plane coast until it hits the ground again, then they push again, jump on again, and so on.
Mac Airways
All the stewards, captains, baggage handlers, and ticket agents look the same, act the same, and talk the same. Every time you ask questions about details, you are told you don't need to know, don't want to know, and everything will be done for you without you having to know, so just shut up.
Windows Airline
The airport terminal is nice and colorful with friendly stewards, easy access to the plane, an uneventful takeoff... then the plane blows up without any warning whatsoever.
Fly 95
Everyone marches out onto the runway, says the parseword in unison, and forms the outline of an airplane. Then they all sit down and make a whooshing sound like they're flying.
Unix Airline
Everyone bring one piece of the airplane with them when they come to the airport. They all go out on the runway and put the plane together piece by piece, arguing constantly about what kind of plane they're building.