Nearly 10,000 flights to or from US airports had been cancelled through Saturday as of 04.30 UTC (23.30 ET) on 14 November, according to Flightradar24. It warns the effects will be felt throughout the weekend.
Flightradar24 says Delta and American have each cancelled more than 2,200 flights, United 1,800 and Southwest nearly 1,400. These are the first airline-by-airline totals to emerge.
The figure is a different measure from those reported earlier. It covers flights both to and from US airports across Friday and Saturday. The earlier counts of 4,467 from FlightAware and 4,700 from Flightradar24 covered Friday only, so the totals are not directly comparable.
Flightradar24 also says the FAA command centre advisory shows the nationwide ground stop as "cancelled" between 01.16 and 01.30 UTC on 14 November. Earlier, CNN had reported that the stop remained in effect.
According to Flightradar24, some aircraft at major airports waited more than five hours for a gate after landing during the stop.
The cancellation figures have not been independently checked.