There are
1,109 mi
from Irvine, CA to Lewiston, ID
That's the driving distance. It would take 21 hours 28 mins to go from Irvine, California to Lewiston, Idaho.
The flight distance (direct flight from Irvine, CA to Lewiston, ID) is 879.62 mi.
1,109 mi = 1.61 kms