Are there nonstop flights from Xi'an (XIY) to Osaka (KIX)?

No. The fastest connection is via Busan, about 3h 51m of total flying time.

What is the fastest connection from Xi'an (XIY) to Osaka (KIX)?

via Busan ≈ 3h 51m, via Qingdao ≈ 3h 52m, via Jeju City ≈ 3h 52m (estimated flying time, excluding layovers).

from 11,500 ANA miles, from 15,000 JAL miles (economy, one way, based on the published award charts).

Xi'an Xianyang International Airport (XIY) to Kansai International Airport (KIX)・2,422 km

No nonstop flights. The fastest connection is via Busan (PUS), about 3h 51m of flying time (layover not included).

With milesANA 11,500 miles+ (via ICN)JAL 15,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

20 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.