The halfway point between Dallas, Texas and Warren, Ohio is in Centerville, Tennessee.
It is 126 miles according to Google Maps.
Washburn, TX is the halfway point.
Distance between Dallas and Longview Texas:Miles: about 128 if using I-20 or 132mi if using Hwy 276 & US80Time: 1hr 53min for Interstate or 2hrs 27minPublic Transit (train) - 2hrs 35minIt is 126 miles according to Google Maps.
Nashville, TN
Dallas
Amarillo, TX
Powderlick, OH.
1/2 is the halfway point
A rough estimate would be Amarillo, Texas.
TENNESEE
Turrell, AR