UPDATE 1:30 p.m. American Airlines said its computers were back online after experiencing a widespread outage on Thursday, according to NBC affiliate WMAQ.
The company later took to Twitter to announce the problems had been resolved.
At 3:35 p.m., a flight status check using the Kansas City International Airport website still showed delays for several American Airlines flights.
The Federal Aviation Administration says American Airlines flights were been grounded nationwide due to computer issues.
According to the FAA's database, planes were grounded because of an "airline issue."
The airline tweeted responses to concerns from several customers.
@gjsauser We’re working to resolve technical issues and apologize for the inconvenience
— American Airlines (@AmericanAir) September 17, 2015
For information about flights at Kansas City International Airport, click here.