There are
943 mi
from St Louis, MO to Sayreville, NJ
That's the driving distance. It would take 17 hours 50 mins to go from St Louis, Missouri to Sayreville, New Jersey.
The flight distance (direct flight from St Louis, MO to Sayreville, NJ) is 852.15 mi.
943 mi = 1,516.84 kms