The fair place to meet is Detroit, MI — the city closest to the midpoint of Chicago and Pittsburgh. From the farther side that’s about 4 hr 58 min of driving.
Recommended midpoint
Detroit, MI
From Chicago
4 hr 58 min
237 mi to Detroit
From Pittsburgh
4 hr 18 min
205 mi to Detroit
Pittsburgh has the shorter trip; the split is off by about 40 min. The alternatives below can even it out. Chicago and Pittsburgh are about 409 miles apart.
Chicago and Pittsburgh are about 409 miles apart by road. Split the difference and you arrive near Detroit, the city closest to the halfway point between them. That puts roughly 4 hr 58 min of driving on the Chicago side and 4 hr 18 min on the Pittsburgh side — the fairest single meeting point among the cities near the middle.
That's a half-day drive from each side, so Detroit suits an overnight or a weekend rather than a quick coffee — long enough to want a reason to stay, short enough to drive.
If Detroit doesn't have what you're after, Columbus and Cleveland are also close to the midpoint and worth a look — each keeps the drive reasonably balanced between Chicago and Pittsburgh.
Detroit is the most populous city in the U.S. state of Michigan. It is situated on the bank of the Detroit River across from the Canadian city of Windsor, Ontario. It is the 26th-most populous city in the United States and the largest U.S. Read more →
Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States, with a population of 2.74 million at the 2020 census. Read more →
Pittsburgh is a city in Allegheny County, Pennsylvania, United States, and its county seat. 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.