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

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

United Airlines has issued a warning to customers and pre-emptively canceled several flights as the airline takes most of its ...

United Airlines is conducting a planned overnight technology upgrade affecting its flight reservation system on Wednesday, ...

United Airlines passengers are facing a big change beginning Tuesday as the airline shifts how early fliers must check-in for trips. If passengers don't abide by the new rules, United says, their ...

United Airlines is offering refunds to all passengers who are traveling during the flight reductions ordered by the FAA starting on Nov. 7. The ongoing government shutdown will lead to a 10% reduction ...