Are there nonstop flights from Udon Thani (UTH) to Taipei (TPE)?

No. The fastest connection is via Chiang Mai, about 4h 20m of total flying time.

What is the fastest connection from Udon Thani (UTH) to Taipei (TPE)?

via Chiang Mai ≈ 4h 20m, via Bangkok ≈ 4h 28m, via Bangkok ≈ 4h 29m (estimated flying time, excluding layovers).

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

Udon Thani International Airport (UTH) to Taiwan Taoyuan International Airport (TPE)・2,091 km

No nonstop flights. The fastest connection is via Chiang Mai (CNX), about 4h 20m of flying time (layover not included).

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

None.

4 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.