Flying is always an unpleasant experience. You wait an hour for every ten minutes you actually spend getting anywhere.
My advice is not to wait to be struck by an idea. If you're a writer, you sit down and damn well decide to have an idea. That's the way to get an idea.
People waiting for an elevator don't know what to do, standing with strangers. There is nothing to do. Its an uneasy time. Some press the button repeatedly as though it would help.
Almost all of us have an elevator or two in our lives somewhere. We wait for them, we ride on them. We're annoyed by the wait but pleased with the lift.