Flight CG8572, en route to Wewak and Vanimo, was grounded at the Madang airport for two hours.
The flight's captain explained to passengers that, by law, they will not take off unless all passengers are accounted for and confirmed on the manifest.
The confusion started in Lae, Morobe Province, when the airline company's ground crew allegedly issued seat numbers that were already occupied by passengers from Port Moresby, bound for Madang, Wewak and Vanimo.
The Madang ground crew reportedly made the same mistake.