Airport Commander Robert Wane confirmed with Loop PNG this afternoon that a cash amount of K1.2 million was stolen.
The money was on its way to Kiunga in Daru.
The five suspects came in a white Ford Ranger.
Two waited in the car at the airport car park while three of the suspects, armed with pistols walked into the domestic terminal dressed in brown khaki disguised as guards.
They headed straight for the Tropic Air counter and departure lounge where the money was checked in to be loaded into the charted flight.