Southwest Airlines planes had been stopped from taking off nationwide within the US for what the airline referred to as an intermittent expertise concern, inflicting greater than 1,500 flight delays on Tuesday.

It got here 4 months after the service suffered delays over the Christmas journey rush.

Southwest and the Federal Aviation Administration mentioned by late morning on the East Coast that the pause had been lifted.

“Early this morning, a vendor-supplied firewall went down and connection to some operational data was unexpectedly lost.”

By late morning on the East Coast, Southwest accounted for properly over half of all delays nationwide, however the airline had cancelled fewer than a dozen flights, in line with FlightAware.

In December, Southwest cancelled practically 17,000 flights over the Christmas vacation as a consequence of dangerous climate and its crew-scheduling system changing into overwhelmed.

Those cancellations price the airline greater than a billion {dollars} (£0.8 billion) and are being investigated by the US Transportation Department.