Are there nonstop flights from Oslo (OSL) to Arusha (JRO)?

No. The fastest connection is via Istanbul, about 9h 47m of total flying time.

What is the fastest connection from Oslo (OSL) to Arusha (JRO)?

via Istanbul ≈ 9h 47m, via Addis Ababa ≈ 9h 52m, via Zurich ≈ 10h 6m (estimated flying time, excluding layovers).

from 30,000 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Oslo-Gardermoen International Airport (OSL) to Kilimanjaro International Airport (JRO)・7,426 km

No nonstop flights. The fastest connection is via Istanbul (IST), about 9h 47m of flying time (layover not included).

With milesANA 30,000 miles+ (via IST)JAL 37,000 miles+ (via CDG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

10 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.