All Air New Zealand flights to and from Sydney tomorrow have been canned - except for one

The Government's paused flights from the Australian state New South Wales from midnight, for at least two days.

It comes after two new cases were found in Sydney with an unknown cause of transmission.

NZ103 will operate across the ditch as normal -- but the return service back to Auckland will be strictly cargo-only.

Impacted customers can rebook, put their flight into credit or apply for a refund - if they bought a refundable ticket.