There are
2,666 mi
from Ukiah, CA to Niagara Falls, NY
That's the driving distance. It would take 1 day 23 hours to go from Ukiah, California to Niagara Falls, New York.
The flight distance (direct flight from Ukiah, CA to Niagara Falls, NY) is 2,288.37 mi.
2,666 mi = 4,290.40 kms