UPDATE for Christchurch Airport for 10am

While Christchurch Airport remains OPEN there is now 8mm of snow covering the full length of the main runway.

While Christchurch International Airport remains operational - Airlines and Air Traffic Control are advising aircraft of any change in conditions

All aircraft movements remain at the discretion of the Airlines.

Two Air New Zealand international flights have departed this morning for Brisbane and Melbourne and there have been two domestic inbound arrivals.

But Singapore Airlines has now diverted its inbound Christchurch flight to Auckland.

There have been no domestic flights out...largely because of a large amount of inbound aircraft not arriving.

It is essential passengers check with their Airlines before commencing travel.

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