Are there nonstop flights from Santa Rosa (STS) to Missoula (MSO)?

No. The fastest connection is via San Francisco, about 2h 34m of total flying time.

What is the fastest connection from Santa Rosa (STS) to Missoula (MSO)?

via San Francisco ≈ 2h 34m, via Portland ≈ 2h 43m, via Seattle ≈ 2h 54m (estimated flying time, excluding layovers).

from 12,000 JAL miles (economy, one way, based on the published award charts).

Charles M. Schulz Sonoma County Airport (STS) to Missoula Montana Airport (MSO)・1,174 km

No nonstop flights. The fastest connection is via San Francisco (SFO), about 2h 34m of flying time (layover not included).

With milesJAL 12,000 miles+ (via PDX)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

9 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.