Are there nonstop flights from Bangkok (BKK) to Guangyuan (GYS)?

No. The fastest connection is via Kunming, about 3h 31m of total flying time.

What is the fastest connection from Bangkok (BKK) to Guangyuan (GYS)?

via Kunming ≈ 3h 31m, via Guiyang ≈ 3h 37m, via Nanning ≈ 3h 48m (estimated flying time, excluding layovers).

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

Suvarnabhumi Airport (BKK) to Guangyuan Panlong Airport (GYS)・2,140 km

No nonstop flights. The fastest connection is via Kunming (KMG), about 3h 31m of flying time (layover not included).

With milesANA 18,000 miles+ (via CAN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

15 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.