There are
2,625 mi
from Tracy, CA to Niagara Falls, NY
That's the driving distance. It would take 1 day 21 hours to go from Tracy, California to Niagara Falls, New York.
The flight distance (direct flight from Tracy, CA to Niagara Falls, NY) is 2,235.94 mi.
2,625 mi = 3.22 kms