Are you someone who missed their United Airlines flight? If yes, are you aware of what you should do from here about missed flight United Airlines? United Airlines has a policy about missed flights. Here, you can check out United Airlines' missed flight policy and learn what steps you can take next. In case you do not show up at the airport on time, then United Airlines will cancel your United flight booking, which is known as a 'No Show.?' To avoid this situation, it is always a good idea to promptly connect with a United Airlines representative. Also, one can rebook their flight themselves.