Call it a 4 hour drive and about 260 miles on I-40.
My guess is Oklahoma City because Dallas is farther and i think Denver and Albuquerque may even be closer to Amarillo then Dallas is.
It is 259.52 according to MapQuest.
The distance in miles from Tulsa, Oklahoma to Oklahoma City, Oklahoma is 106.6 miles.
Amarillo
The city located between Amarillo, Texas, and Oklahoma City, Oklahoma, along Interstate 40 is Elk City, Oklahoma. It's a small city known for its Route 66 heritage and serves as a convenient stop for travelers on the interstate. Elk City offers various amenities, including dining options and attractions that reflect its historical significance.
One big city that is halfway between California and Ohio is Amarillo, TX. Another is Oklahoma City, Oklahoma. Not as big but almost exactly halfway is Elk City, Oklahoma.
Take I-35 north to I-40 WEST to AMARILLO at EXIT 126 (LEFT EXIT) in Oklahoma City in Oklahoma. When I-35 splits into I-35E & I-35W, by the way, you want to take I-35W to FT. WORTH.Take I-40 WEST to Amarillo, TX.
The halfway point between Colorado Springs, CO, and downtown Oklahoma City, OK, is approximately near the town of Amarillo, Texas. This location is roughly equidistant from both cities, making it a convenient stop for travelers. The distance from Colorado Springs to Oklahoma City is about 600 miles, so Amarillo serves as a good midpoint for rest and refueling.
Assuming that you are driving, the halfway point is right around Elk City, Oklahoma. The closest cities to the halfway point are Oklahoma City, Oklahoma and Amarillo, Texas.
what is the driving distance from Oklahoma City to Galveston 494 mi - about 7 hours 39 mins
It is 194.09 miles accordng to MapQuest.
It is 65 miles.