The fair place to meet is Dallas-Fort Worth, TX — the city closest to the midpoint of Austin and Oklahoma City. From the farther side that’s about 4 hr of driving.
Recommended midpoint
Dallas-Fort Worth, TX
From Austin
3 hr 49 min
182 mi to Dallas
From Oklahoma City
4 hr
190 mi to Dallas
That’s an even split — both sides drive within 11 min of each other. Austin and Oklahoma City are about 360 miles apart.
Austin and Oklahoma City are about 360 miles apart by road. Split the difference and you arrive near Dallas, the city closest to the halfway point between them. That splits the trip almost evenly — about 3 hr 49 min from Austin and 4 hr from Oklahoma City.
That's a half-day drive from each side, so Dallas suits an overnight or a weekend rather than a quick coffee — long enough to want a reason to stay, short enough to drive.
If Dallas doesn't have what you're after, San Antonio and Houston are also close to the midpoint and worth a look — each keeps the drive reasonably balanced between Austin and Oklahoma City.
Dallas is a city in the U.S. state of Texas. Located in the state's northern region, it is the ninth-most populous city in the United States and third-most populous city in Texas, with a population of 1.3 million at the 2020 census. Read more →
Austin is the capital city of the U.S. state of Texas. With a population of 961,855 at the 2020 census, it is the 12th-most populous city in the U.S., fifth-most populous city in Texas, and second-most populous U.S. Read more →
Oklahoma City, often shortened to OKC, is the capital and most populous city in the U.S. state of Oklahoma. It is the 21st-most populous U.S. city and 8th largest in the Southern United States, with a population of 681,054 at the 2020 census. Read more →
City descriptions adapted from Wikipedia (CC BY-SA); photos via Wikimedia Commons, credited above.
Estimates use straight-line distance and typical road speeds; real drive times vary with route and traffic.