A computer glitch in the reservations system at American Airlines caused all of the carrier's flights to be grounded for at least two hours on Tuesday.
"American's reservation and booking tool, Sabre is offline," American Airlines spokeswoman Mary Frances Fagan told Reuters in an email. "We're working to resolve the issue as quickly as we can. We apologize to our customers for any inconvenience."
NPR's Wade Goodwyn reports that the outage was announced about 2:30 p.m. Eastern time.