Are there nonstop flights from Osaka (ITM) to Bangkok (BKK)?

No. The fastest connection is via Fukuoka, about 5h 57m of total flying time.

What is the fastest connection from Osaka (ITM) to Bangkok (BKK)?

via Fukuoka ≈ 5h 57m, via Okinawa (Naha) ≈ 6h 7m, via Tokyo ≈ 6h 53m (estimated flying time, excluding layovers).

from 13,500 JAL miles, from 15,000 ANA miles (economy, one way, based on the published award charts).

Osaka Itami International Airport (ITM) to Suvarnabhumi Airport (BKK)・4,194 km

No nonstop flights. The fastest connection is via Fukuoka (FUK), about 5h 57m of flying time (layover not included).

With milesJAL 13,500 miles+ (via HND)ANA 15,000 miles+ (via HND)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.