Are there nonstop flights from Santa Rosa (STS) to Bozeman (BZN)?

No. The fastest connection is via Boise, about 2h 29m of total flying time.

What is the fastest connection from Santa Rosa (STS) to Bozeman (BZN)?

via Boise ≈ 2h 29m, via Salt Lake City ≈ 2h 47m, via Portland ≈ 2h 59m (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 Bozeman Yellowstone International Airport (BZN)・1,254 km

No nonstop flights. The fastest connection is via Boise (BOI), about 2h 29m of flying time (layover not included).

With milesJAL 12,000 miles+ (via BOI)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.