PX CEO, Alan Milne, said the first two will arrive before the end of 2020 and the other two in 2021.
He made the announcement at the Port Moresby Chamber of Commerce & Industry Breakfast event yesterday.
The announcement by the Air Niugini CEO comes in the wake of the Ethiopian Airlines 737 MAX 8 aircraft crash killing all passengers and crew on board.
The incident has seen the grounding of 737 MAX 8 aircrafts by major airline companies around the world.
