Are there nonstop flights from Osaka (KIX) to Hat Yai (HDY)?

No. The fastest connection is via Bangkok, about 6h 47m of total flying time.

What is the fastest connection from Osaka (KIX) to Hat Yai (HDY)?

via Bangkok ≈ 6h 47m, via Bangkok ≈ 6h 48m, via Chiang Mai ≈ 7h 15m (estimated flying time, excluding layovers).

from 19,000 ANA miles (economy, one way, based on the published award charts).

Kansai International Airport (KIX) to Hat Yai International Airport (HDY)・4,698 km

No nonstop flights. The fastest connection is via Bangkok (BKK), about 6h 47m of flying time (layover not included).

With milesANA 19,000 miles+ (via BKK)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

5 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.