Are there nonstop flights from Osaka (KIX) to Phnom Penh (KTI)?

No. The fastest connection is via Taipei, about 5h 42m of total flying time.

What is the fastest connection from Osaka (KIX) to Phnom Penh (KTI)?

via Taipei ≈ 5h 42m, via Xiamen ≈ 5h 43m, via Da Nang ≈ 5h 43m (estimated flying time, excluding layovers).

from 19,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Kansai International Airport (KIX) to Techo International Airport (KTI)・3,999 km

No nonstop flights. The fastest connection is via Taipei (TPE), about 5h 42m of flying time (layover not included).

With milesANA 19,000 miles+ (via TPE)JAL 23,000 miles+ (via HKG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

21 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.