There are
2,601 mi
from Shoreline, WA to Slidell, LA
That's the driving distance. It would take 1 day 22 hours to go from Shoreline, Washington to Slidell, Louisiana.
The flight distance (direct flight from Shoreline, WA to Slidell, LA) is 2,100.07 mi.
2,601 mi = 4,186.34 kms