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 needs its passengers to arrive at the airport earlier if they want to catch their flights on time. Starting on June 3, United Airlines customers flying domestically will need to check ...

Airport officials said travelers should check their flight status before leaving home by calling their airline.

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 ...

CHICAGO -- United Airlines is changing its check-in cutoff time ahead of the busy summer travel season. The Chicago-based airline will now require check-ins for domestic flights 45 minutes before ...

A major airline is changing its check-in policy to require earlier passenger arrivals. Starting June 3, United Airlines will require customers without checked bags to check in for domestic flights at ...

You might want to plan for a little extra time at the airport, if you’re flying on United Airlines. As of Tuesday, the airline is requiring all domestic airline passengers to be checked in for their ...

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 ...