Moving air traffic controllers means retraining them on the quirks of a new facility, and the process can take years.

United Airlines Chief Executive Scott Kirby told customers in an email Monday that it is “absolutely safe” to fly in and out of Newark Liberty International Airport following two weeks of technology a...

U.S. small-business confidence fell for a fourth straight month in April, with the share of owners reporting job openings declining to the lowest level in more than four years, potentially hinting at ...