United Airlines will attempt to rebook you and may allow options for your United Airlines missed flight based on your unique circumstance. If you were ready to fly but missed it because of delays or circumstances outside your control, you may be able to get rebooked without paying extra. For no shows, however, a refund or rescheduling may not be guaranteed. Dial +1-860-374-7617 to get assistance. Alternatively, you can go to iairtickets and read about missed flight policies of United Airlines and the ways to rebook.