Are there nonstop flights from Singapore (SIN) to Port Moresby (POM)?

Yes. Air Niugini fly this route. Flight time is about 6h 18m.

What is the fastest connection from Singapore (SIN) to Port Moresby (POM)?

via Cairns ≈ 7h 52m, via Manila ≈ 8h 25m, via Hong Kong ≈ 9h 58m (estimated flying time, excluding layovers).

from 37,000 JAL miles (economy, one way, based on the published award charts).

Singapore Changi Airport (SIN) to Port Moresby Jacksons International Airport (POM)・4,935 km

Nonstop flights available (1 airline). Flight time about 6h 18m. Nonstop return flights also operate.

With milesJAL 37,000 miles+ (via BNE)Economy, one way, estimate. Tap a connection for miles by cabin.

6 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.