Distance from Cairns to Port Moresby
How far is it from Cairns to Port Moresby? About 523 mi in a straight line and 638 mi by road. Driving time, flight time, midpoint and route details.
Cairns and Port Moresby are about 523 mi (841 km) apart in a straight line. By road that works out to roughly 638 mi (1,027 km), a drive of about 10 hr 48 min. A nonstop flight covers the great-circle distance in approximately 1 hr 28 min.
| Straight-line distance | 523 mi / 841 km |
| Road distance (est.) | 638 mi / 1,027 km |
| Driving time (est.) | 10 hr 48 min |
| Nonstop flight (est.) | 1 hr 28 min |
| Driving fuel (est., 1-way) | $80 |
| Typical flight fare | $80–$250 |
| Geographic midpoint | -13.201, 146.469 |
How these estimates work
Straight-line distance uses the haversine formula on each city's coordinates. Road distance applies a circuity factor (~1.2–1.4×) and driving time a blended average speed. Flight time uses typical jet cruise speed plus ~30 minutes for taxi, climb and descent. Treat all figures as planning estimates.
Frequently asked questions
Cairns to Port Moresby is about 523 mi (841 km) in a straight line, and roughly 638 mi (1,027 km) by road.