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.

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

Many online services will be unavailable in the early morning of Wednesday, Feb. 4, per an alert on its website. Here's what to know ...

United Airlines will disable many of its app and website functions between 2:30 a.m. and 6:00 a.m. Wednesday morning for an ...

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

The aim of the move is to improve reliability. United, the largest U.S. airline by fleet size, with 1,000 aircraft, has been warning passengers about the outage and reportedly adjusted domestic ...

Add Yahoo as a preferred source to see more of our stories on Google. Passengers check in at O'Hare International Airport in Chicago. (Scott Olson/Getty Images) (Scott Olson via Getty Images) There ...

Gift Article 10 Remaining As a subscriber, you have 10 articles to gift each month. Gifting allows recipients to access the article for free. The technology glitch that left United Airlines flights ...

JetBlue and United roll out reciprocal revenue bookings under Blue Sky, allowing travelers to book eligible flights with cash ...

United Airlines is changing the amount of time travelers have to check in for a flight starting next month. Beginning June 3, those flying United will need to check in within 45 minutes of their ...