There are
2,531 mi
from Temecula, CA to Niagara Falls, NY
That's the driving distance. It would take 1 day 20 hours to go from Temecula, California to Niagara Falls, New York.
The flight distance (direct flight from Temecula, CA to Niagara Falls, NY) is 2,149.52 mi.
2,531 mi = 3.22 kms