French, New Mexico
The town of Marana is about halfway.
The halfway point between Decatur, Illinois, and Phoenix, Arizona falls in Clarendon, Texas.
The halfway point from Detroit to Phoenix is very close to Wichita, Kansas.
Liberal Kansas is close to the halfway point.
Las Vegas
Hebron, Ohio is the halfway point between St. Louis, Missouri and Philadelphia, Pennsylvania according to Meetways.com.
Kansas
Springfield, North Carolina is the halfway point.
Otter Village, IN
On a map, it looks to be close to Eagle Mountain.
Elk City, OK
According to MeetWays, halfway between Cheyenne, Wyoming and Wichita, Kansas would be a point near Brewster, Kansas on I70.