Are there nonstop flights from Hayden (HDN) to Santa Rosa (STS)?

No. The fastest connection is via San Francisco, about 2h 42m of total flying time.

What is the fastest connection from Hayden (HDN) to Santa Rosa (STS)?

via San Francisco ≈ 2h 42m, via Denver ≈ 3h 7m, via Los Angeles ≈ 3h 12m (estimated flying time, excluding layovers).

from 15,000 JAL miles (economy, one way, based on the published award charts).

Yampa Valley Airport (HDN) to Charles M. Schulz Sonoma County Airport (STS)・1,354 km

No nonstop flights. The fastest connection is via San Francisco (SFO), about 2h 42m of flying time (layover not included).

With milesJAL 15,000 miles+ (via SAN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

5 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.