All US United Continental flights grounded
All United Continental flights in the U.S. have been grounded due to computer problems.
United said Wednesday that it is working to resolve the problems, which are related to "network connectivity."
It is the second time in two months that the carrier has been hit by major technical issues.
The Chicago company had halted all takeoffs in the U.S. on June 2 due to what the airline described as computer automation issues.
