Air New Zealand Acting Chief Executive Officer Jeff McDowall said the airline had been working hard to look at how best to utilise its turboprop aircraft and crew to support routes impacted by Jetstar's withdrawal.
"We're pleased to be able to get behind regional New Zealand by adding these extra services, particularly during the summer months.
"These additional services reflect an increase of nearly 50,000 extra seats to and from regional New Zealand from December through to the end of March."
The airline also announced late last month it will be adding an extra 253 one-way services on the same routes in December, reflecting an increase of more than 15,500 extra seats in that month alone.
Air New Zealand is also assisting affected Jetstar customers with a special fare.
Eligible customers can email jqsupport@airnz.co.nz with proof of their affected Jetstar ticket.