QANTAS Freight has cleared a backlog of cargo at its Brisbane facility but said snarl-ups in Sydney and Melbourne remain.

The company said that operations at its Brisbane facility were "back to business as usual" after an IT blackout on September 24 caused backlogs at its Australian facilities.

While the logjam at Brisbane has been cleared, the company said it would be later this week that the Melbourne and Sydney stations were cleared, reports London's Air Cargo News.

"The vast majority of exports and transships have also been uplifted with a small number of freight items still experiencing minor delays with rebooking."

It's not just Qantas shipments that are being delayed by the backlog, the carrier said that its stations also handle cargo for other airlines, and these shipments were also subject to delays.

The carrier said that any claims for delayed or damaged freight must be requested online and time limits apply.

Any storage fees which may apply due to delayed processing will be waived.