Papua New Guinea does not have an integrated road network connecting its major population centers. Port Moresby has no road connection to Lae, Mount Hagen, Madang, or any other significant city. Air travel serves as the primary long-distance transport method across the country's 462,840 square kilometers. Air Niugini operates the majority of domestic routes from Port Moresby to provincial capitals including Lae, Mount Hagen, Goroka, Madang, Wewak, Alotau, and Kokopo. Airlines PNG operates smaller aircraft to secondary destinations and remote airstrips. Both carriers fly Twin Otters and Dash-8 aircraft depending on runway conditions.
The Highlands Highway connects Lae on the north coast to Mount Hagen in the Western Highlands Province, passing through Goroka. This 700-kilometer route represents Papua New Guinea's longest continuous sealed road. The highway deteriorates significantly during wet months with sections becoming impassable due to landslides and washouts. Travel time from Lae to Mount Hagen takes eight to twelve hours depending on road conditions. Public motor vehicle (PMV) operators run buses along this route, though robbery incidents occur with documented frequency in certain sections near Goroka and in the Kassam Pass area. Hiring a private vehicle with driver costs 1500 to 2500 kina for the full journey.
Port Moresby has minimal paved road infrastructure outside the central district. The city lacks a public bus system. PMVs operate informal routes but present security concerns for visitors unfamiliar with neighborhoods. Taxi services exist but do not use meters. Pre-negotiating fares prevents disputes, with typical journeys across the city ranging from 20 to 50 kina. Hotels arrange vehicle hire with drivers at 400 to 800 kina per day. Walking between locations in Port Moresby is not recommended by the Australian government's travel advisory due to street crime rates.
Boats provide essential transport throughout Papua New Guinea's coastal and island regions. The Bismarck Archipelago, including New Britain, New Ireland, and Manus Island, relies on shipping services from Port Moresby and Lae. Lutheran Shipping operates cargo and passenger vessels on irregular schedules to Kimbe, Kokopo, Kavieng, and Lorengau. Voyage durations from Port Moresby to Kokopo take approximately 30 hours. Deck passage costs 150 to 300 kina while cabin berths range from 500 to 800 kina. Smaller boats connect outlying islands but lack fixed timetables.
The Sepik River functions as a transportation corridor for communities along its 1,126-kilometer length. Motorized canoes serve as the primary vessels, with travel from Wewak to Ambunti taking six to ten hours depending on current and engine power. No scheduled service exists. Villages arrange transport through guesthouse operators or mission stations. Costs depend on fuel prices and negotiation, typically 800 to 1,500 kina for multi-day river journeys including guide services.
Kokoda Track requires walking. The 96-kilometer trail crosses the Owen Stanley Range between Kokoda in the north and Owers Corner near Port Moresby. Trekking companies are mandatory under Papua New Guinea regulations established in 2007. Licensed operators provide porters and guides, with full-service treks costing 3,500 to 6,000 kina per person for the standard eight-day crossing. The Papua New Guinea Tourism Promotion Authority maintains the operator license list.
Renting vehicles without drivers is uncommon outside Port Moresby. Budget and Avis operate at Jackson's International Airport with 4WD vehicles starting at 400 kina per day. Fuel costs approximately 4.50 kina per liter in Port Moresby and increases significantly in remote areas where fuel arrives by air. International driving permits are recognized. Road signage is minimal outside urban areas.
Papua New Guinea's seasons divide into the wet and dry periods, though these patterns vary substantially by region due to the country's mountainous topography. The driest months generally fall between May and October across most of Papua New Guinea, while November through April brings higher rainfall. Port Moresby receives approximately 1,000 millimeters of annual rainfall, concentrated between December and March. The city experiences less rainfall than northern coastal areas due to its position in a rain shadow created by the Owen Stanley Range.
The Highlands provinces including Mount Hagen, Goroka, and Mendi receive rainfall throughout the year with no pronounced dry season. Mount Hagen records average monthly rainfall between 200 and 400 millimeters every month. Afternoon thunderstorms occur regularly. Morning conditions are typically clearer. Temperatures in the Highlands remain stable year-round, with Mount Hagen averaging daily maximums near 25 degrees Celsius and nighttime minimums around 12 degrees Celsius.