Airlines are one of the most heavily unionized industries in the country. That works out well for customers and investors at Southwest, but less well at other airlines. Delta, the other historically strong performer, is mostly non-union. Their largest unionized work group is their pilots. Delta’s dispatchers are also unionized.
The biggest flight attendants union is working hard to change that – even as they publish data that 97% of flight attendants they represent at United are deeply unhappy.