After paying tribute to the bonds of mateship and sacrifice Australia and Papua New Guinea forged in the Second World War, Malcolm Turnbull will turn his attention to business ties.
The prime minister wraps up his official visit to PNG on Sunday morning.
This year marks the 75th anniversary of the Kokoda Trail campaign and Mr Turnbull laid a floral wreath at the Isurava memorial and honoured Australia's war dead at the Bomana War Cemetery on Saturday.
Mr Turnbull is expected to address an Australia Papua New Guinea Business Council breakfast in Port Moresby on Sunday morning before flying out to India.
Problems accessing foreign currency in the PNG capital as well as the visa processes will be among the perennial issues raised with the prime minister.
Total two-way trade between the countries was worth $5.8 billion in 2015/16 and Australian investment in PNG totals $18.4 billion.
Mr Turnbull on Saturday had bilateral talks with PNG Prime Minister Peter O'Neill, who will shortly face PNG voters at an election.
Australia will send a team to monitor the poll and has been skilling up PNG's electoral commission.
The leaders confirmed the Manus Island immigration detention centre will close by year end.
A number of refugees in limbo on Manus Island are expected to be resettled in the US, along with others stuck on Nauru.
US Homeland Security officials are expected to travel to PNG to conduct fingerprinting and security interviews in April and May.
But the prime ministers were tight-lipped on the fate of those who won't be selected to move to America.
They also discussed the logistical and security challenges around Port Moresby hosting the APEC leaders summit in 2018.
The PNG capital is a hotbed of violent crime.
Australia is expected to contribute a large portion of the cost and recently announced $48 million in funding to extend the presence of 73 federal police officers in PNG until after the November summit.
Officers are helping PNG police plan security arrangements.
