The US Federal Aviation Administration's traffic management computer system caused flight delays at USairports yesterday.
The hold ups werelargely centred around airports in the north-eastern US as well as Atlanta.
In addition, New York-area airports were experiencing delays. La Guardia Airport was experiencing delays of more than 40 minutes due to weather conditions, and some flights arriving at John F. Kennedy International Airport were delayed by more than an hour, apparently because of the computer problems elsewhere.
An FAA spokeswoman wasn't immediately available for comment on the nature of the computer problems and the number of airports affected. CNN.com was reporting that all major U.S. airports are affected by the computer problem at a facility near Atlanta.
Problems processing data there meant that flight-plan information had to be routed through another facility in Salt Lake City. Those two sites handle all flight plans for commercial and general flights in the U.S., CNN quoted an FAA spokeswoman as saying.
Although CNN had reported that the number of affected airports was on the FAA site Tuesday afternoon, those details were later removed. The site was apparently overloaded late Tuesday afternoon on the East Coast.