There are
1,515 mi
from Arvada, CO to Niagara Falls, NY
That's the driving distance. It would take 1 day 3 hours to go from Arvada, Colorado to Niagara Falls, New York.
The flight distance (direct flight from Arvada, CO to Niagara Falls, NY) is 1,362.42 mi.
1,515 mi = 1.61 kms