Are there nonstop flights from Sendai (SDJ) to Kaohsiung (KHH)?

Yes. Tigerair Taiwan fly this route. Flight time is about 3h 34m.

What is the fastest connection from Sendai (SDJ) to Kaohsiung (KHH)?

via Kobe ≈ 4h 4m, via Osaka ≈ 4h 4m, via Nagoya ≈ 4h 5m (estimated flying time, excluding layovers).

from 11,500 ANA miles (economy, one way, based on the published award charts).

Sendai Airport (SDJ) to Kaohsiung International Airport (KHH)・2,613 km

Nonstop flights available (1 airline). Flight time about 3h 34m. Nonstop return flights also operate.

With milesANA 11,500 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

9 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.