There are
1,740 mi
from Arvada, CO to Middletown, DE
That's the driving distance. It would take 1 day 7 hours to go from Arvada, Colorado to Middletown, Delaware.
The flight distance (direct flight from Arvada, CO to Middletown, DE) is 1,556.15 mi.
1,740 mi = 1.61 kms