The driving distance from McMinnville, Tennessee to Nashville, Tennessee is 73 miles via US-70 per MapQuest. The driving time per MapQuest is 1 hour and 23 minutes.
Presumably you mean Nashville, Tennessee. If you mean Portland, Maine, the midpoint appears to be close to the Pennsylvania/West Virbinia line, southeast of Pittsburgh. If you mean Portland, Oregon, the midpoint is in southeast Wyoming.
Google Maps estimates the driving time as 38 hours.
The distance from Portland Oregon to Bandon Oregon is 262 miles.
The distance from Portland, Oregon to Sutherlin, Oregon is 166 miles (267.2 km).
The distance from Portland, Oregon to Pendleton, Oregon is 208 miles (334.7 km).
It is 12.2 miles (19.6 km) from Portland, Oregon to Gladstone, Oregon.
The driving distance from Portland, OR to Mulino, OR is 25 miles.
It is 163 miles from Portland, OR, to Boardman, OR.
It's about 100 miles from eugene Oregon to south portland Oregon
It is 28 miles from the downtown Portland, Oregon to downtown Sandy, Oregon.
Portland to Portland is 3187 miles.