Citizens from All Pacific countries, All Western European countries, All American countries, New Zealanders and Australians can obtain a visa valid for 60 days on arrival. The visa costs around US$40.
All African countries, all middle eastern countries, all Caribbean island states along with visitors from Bangladesh, Bosnia and Herzegovina, Cambodia, Georgia, India, Kazakhstan, Myanmar, Nepal, North Korea, Pakistan, Peoples Republic of China, Russian Federation, Serbia and Montenegro, Sri Lanka and Vietnam need to arrange a visa before travelling to Papua New Guinea.
If you do not need a visa you need to enter at one of the following entry points or you need to have a visa arranged in advance;
Jackson's International Airport
Kagamuga Airport, Mt Hagen