Some US-bound flights from Sydney airport were grounded or delayed on Saturday after American authorities halted departures and delayed landings at all US airports .

Flights from Melbourne airport were also affected, with travel for passengers expected to depart for Los Angeles shortly after 10am being delayed by almost three hours.

Sydney airport confirmed the US ban on flight arrivals was lifted shortly before 1pm, although it was not known how this would impact delays.

Earlier, the airport confirmed some US-bound flights had been grounded.

“We are aware of the nationwide ground stop issued by the US Federal Aviation Administration and are monitoring the situation closely,” the spokesperson said.

“Passengers travelling to or via the United States should check with their airline for the latest information regarding their flight.”

Passengers on US bound flights from Sydney Airport reported being stuck on the tarmac for three hours before eventually departing.…