Barefoot on Airplanes
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Short snippet from CNN.com, much larger story is about general attire
Don't fly barefoot
US Airways' contract of carriage states that it can remove passengers from a flight if they are "inappropriately clothed."
One thing is for sure: Don't bother showing up for your flight without shoes, unless you're a very young child.
Most airlines, including American, Delta, JetBlue, Southwest, United and US Airways, may refuse to transport you if you are barefoot.
Poole said she once saw a woman who tried to board a flight barefoot and was kicked off. The passenger was rebooked on a later flight, "that is if she could find her shoes," Poole said.