Chris Hipkins will head across the ditch on Tuesday morning for his first overseas trip since becoming Prime Minister to meet Australia's, Anthony Albanese.
Hipkins will depart from Wellington on the Royal NZ Air Force plane to Canberra with media and a small delegation, leaving early on Tuesday morning before returning that night.
He will meet Albanese for semi-formal talks over lunch in Australia's capital.
It marks 40 years since the start of an economic agreement between the two countries and 80 years since both High Commissions were established.
The two are set to discuss the current economic climate and shared security priorities in the wider Indo-Pacific region.
"The trans-Tasman relationship is New Zealand's closest and most important, and it was crucial to me that my first overseas trip as Prime Minister was to Australia," Hipkins said.
"Prime Minister Albanese was the first international leader I spoke with after becoming Prime Minister, and I look forward to continuing our discussion in person on how we can further work together to secure our economies against the global economic challenges we all face.
"The stronger our relationship, and the closer our people-to-people links, the more prosperous and resilient New Zealand and Australia will become."
Albanese said he is looking forward to welcoming Hipkins to Canberra and discussing ways to build on trans-Tasman cooperation.
"I am delighted to welcome Prime Minister Hipkins to Australia. Australia and New Zealand have an extremely close relationship, underpinned by our shared history and generations of personal, business and government links," Albanese said.
"I offer my condolences to all those affected by the devastating floods and loss of life in Auckland. We stand ready to support our family and friends in New Zealand if needed."