There are
1,799 mi
from Topeka, KS to St Helens, OR
That's the driving distance. It would take 1 day 6 hours to go from Topeka, Kansas to St Helens, Oregon.
The flight distance (direct flight from Topeka, KS to St Helens, OR) is 1,452.23 mi.
1,799 mi = 1.61 kms