Delta's website and mobile app go down

A Delta Airlines jet takes off from Fort Lauderdale-Hollywood International Airport February 21, 2013 in Ft. Lauderdale, Florida. AFP PHOTO / Karen BLEIER (Photo credit should read KAREN BLEIER/AFP/Getty Images) KAREN BLEIER

Updated at 2:45 p.m. ET

ATLANTA The website for Delta Air Lines Inc. (DAL) encountered a glitch Thursday, preventing passengers from checking in for flights or booking new tickets there.

Delta's mobile app was down, too.

Visitors to got the following error message:

The airline says the problems began before 11 a.m. Eastern time and that it was working to resolve the problem. By 2:40 p.m. ET, both the site and the app appeared to be up and running again.

A spokesman says airport kiosks worked during the outage and that customers could book tickets by phone.