Are there nonstop flights from Dandong (DDG) to Guangzhou (CAN)?

Yes. China Southern Airlines fly this route. Flight time is about 2h 59m.

What is the fastest connection from Dandong (DDG) to Guangzhou (CAN)?

via Yangzhou ≈ 3h 30m, via Yantai ≈ 3h 30m, via Shanghai ≈ 3h 35m (estimated flying time, excluding layovers).

from 10,000 ANA miles (economy, one way, based on the published award charts).

Dandong Langtou International Airport (DDG) to Guangzhou Baiyun International Airport (CAN)・2,117 km

Nonstop flights available (1 airline). Flight time about 2h 59m. Nonstop return flights also operate.

With milesANA 10,000 miles+ (via PEK)Economy, one way, estimate. Tap a connection for miles by cabin.

7 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.