Starting early Wednesday, United customers won't be able to book flights and access other services as the airline upgrades its reservation system.

United will take its core reservation platform offline as part of a planned controlled restart of its SHARES booking system.

A major airline's bold tech upgrade could leave passengers stranded. Will their plans go smoothly, or will chaos ensue?

United Airlines is set to upgrade its reservation system on Wednesday, customers urged to be prepared for possible glitches.

United said it would be taking down key online and mobile services for about four and a half hours.

In the past, it would often take an hour for a travel agent and airline representative to reserve a seat on an airplane due to paperwork and manual labor. Thankfully, those days are long gone. Airline ...

United Airlines has issued a warning to customers and pre-emptively canceled several flights as the airline takes most of its systems offline for a controlled restart and cutover window for its SHARES ...

Airport Help Desk: Visit an United Airlines counter for urgent ticket or boarding pass modifications Pro Tip: Calling ??? +1-800-228-2534 or +1-800-899-3682 will connect you with a live representative ...