Are there nonstop flights from Seoul (ICN) to Osaka (ITM)?

No. The fastest connection is via Matsuyama, about 2h 8m of total flying time.

What is the fastest connection from Seoul (ICN) to Osaka (ITM)?

via Matsuyama ≈ 2h 8m, via Oita ≈ 2h 12m, via Fukuoka ≈ 2h 14m (estimated flying time, excluding layovers).

from 7,500 ANA miles (economy, one way, based on the published award charts).

Incheon International Airport (ICN) to Osaka Itami International Airport (ITM)・861 km

No nonstop flights. The fastest connection is via Matsuyama (MYJ), about 2h 8m of flying time (layover not included).

With milesANA 7,500 miles+ (via KMI)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

12 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.