There are
1,517 mi
from Amarillo, TX to Niagara Falls, NY
That's the driving distance. It would take 1 day 3 hours to go from Amarillo, Texas to Niagara Falls, New York.
The flight distance (direct flight from Amarillo, TX to Niagara Falls, NY) is 1,331.26 mi.
1,517 mi = 1.61 kms