There are
1,389 mi
from Richardson, TX to Niagara Falls, NY
That's the driving distance. It would take 1 day 1 hour to go from Richardson, Texas to Niagara Falls, New York.
The flight distance (direct flight from Richardson, TX to Niagara Falls, NY) is 1,187.12 mi.
1,389 mi = 1.61 kms