Are there nonstop flights from Zhengzhou (CGO) to Phnom Penh (KTI)?

Yes. Air Cambodia fly this route. Flight time is about 3h 43m.

What is the fastest connection from Zhengzhou (CGO) to Phnom Penh (KTI)?

via Nanning ≈ 4h 13m, via Sanya ≈ 4h 15m, via Hanoi ≈ 4h 16m (estimated flying time, excluding layovers).

from 15,000 JAL miles, from 18,000 ANA miles (economy, one way, based on the published award charts).

Zhengzhou Xinzheng International Airport (CGO) to Techo International Airport (KTI)・2,730 km

Nonstop flights available (1 airline). Flight time about 3h 43m. Nonstop return flights also operate.

With milesJAL 15,000 miles+ (via HKG)ANA 18,000 miles+ (via SZX)Economy, one way, estimate. Tap a connection for miles by cabin.

22 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.