Thousands of jobs are on the line at Air New Zealand as it looks to reduce as its workforce by a third.

Air New Zealand is reducing trans-Tasman capacity by 80 per cent and suspending 13 Australian routes as travel restrictions resulting from coronavirus hit the airline hard.

The changes will take effect from March 30 to June 30 but those dates could change, the airline said.

Meanwhile, across the ditch Qantas and its subsidiary Jetstar were cutting international capacity by around 90 per cent from the end of March until at least the end of May and domestic capacity would be cut by around 60 per cent, resulting in the grounding of around 150 aircraft, including almost all of the group's wide-body fleet.

The route-by-route details of the changes across Qantas and Jetstar was being worked through and would be announced in coming days.

READ MORE:

* Air New Zealand cuts long-haul capacity by 85 per cent, 'dropping 30% of staff'

* Coronavirus hit on Auckland Airport follows already sluggish growth, analysts say

New Zealand Airline Pilots Association president Adnrew Ridling said at a best guess the Qantas changes would result in a drop from 24 flights per day to about six per day by Jetconnect, a subsidiary airline of Qantas that operates international flights between New Zealand and Australia across the Tasman.

As of Monday 1am the Government required all travellers arriving in New Zealand to self isolate for 14 days, in an effort to stop the spread of coronavirus.

LAWRENCE SMITH/STUFF Plug pulled on Auckland-Buenos Aires and Los Angeles-London routes.

The restriction delivered a huge blow to New Zealand's aviation and tourism sectors with Air New Zealand already announcing sweeping capacity cuts across its network.

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On Monday Air New Zealand said over the coming months it would be reducing its long-haul capacity by 85 per cent and domestic capacity by 30 per cent.

On Tuesday the airline announced the following planned capacity reductions for its valuable trans-Tasman Australian network:

* Wellington to Sydney: Reduced to two return services per week.

* Christchurch to Sydney: Reduced to two return services per week.

* Auckland to Sydney: Reduced to seven return services per week.

* Auckland to Brisbane: Reduced to five return services per week.

* Auckland to Melbourne: Reduced to seven return services per week.

The following routes have been suspended:

* Auckland-Adelaide

* Auckland-Cairns

* Auckland-Sunshine Coast

* Auckland-Coolangatta

* Auckland-Perth

* Christchurch-Brisbane

* Christchurch-Melbourne

* Christchurch-Coolangatta

* Wellington-Brisbane

* Wellington-Melbourne

* Queenstown-Melbourne

* Queenstown-Sydney

* Queenstown-Brisbane

The airline asks customers to not contact the airline unless they are due to fly within the next 48 hours or need immediate repatriation to New Zealand or their home country.

The World Health Organisation said on Monday (New Zealand time) there had been nearly 10,000 new Covid-19 cases and 343 deaths in the past 24 hours taking the global total to 153,517 confirmed cases and 5735 deaths.

New Zealand has eight cases.

Air New Zealand is currently in a trading halt on the New Zealand stock to assess the operational and financial impact of the Government's new travel restrictions and to prepare an announcement to the market.

Air New Zealand's share price has fallen from $3 in early January to trade at $1.54 on Monday before entering a halt.

The airline is also awaiting a Government announcement on Tuesday that is expected to provide economic stimulus to industries and organisations hit especially hard by coronavirus border restrictions.

Air New Zealand chief executive Greg Foran said on Monday that the airline's 12,500 workforce could reduce by 30 per cent.

Qantas said its capacity cuts would affect its 30,000 strong workforce as it not had a "significant labour surplus across its operations".

Qantas and Jetstar customers with existing bookings on any domestic or international flight until May 31, who no longer wish to travel, can cancel their flight and retain the value of the booking as a travel credit voucher.