Are there nonstop flights from Changzhou (CZX) to Vientiane (VTE)?

Yes. Lao Airlines fly this route. Flight time is about 3h 14m.

What is the fastest connection from Changzhou (CZX) to Vientiane (VTE)?

via Nanning ≈ 3h 44m, via Changsha ≈ 3h 44m, via Guangzhou ≈ 3h 50m (estimated flying time, excluding layovers).

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

Changzhou Benniu International Airport (CZX) to Wattay International Airport (VTE)・2,320 km

Nonstop flights available (1 airline). Flight time about 3h 14m. Nonstop return flights also operate.

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

14 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.