The fair place to meet is Dallas-Fort Worth, TX — the city closest to the midpoint of Miami and Salt Lake City. From the farther side that’s about 23 hr 17 min of driving.
Recommended midpoint
Dallas-Fort Worth, TX
From Miami
23 hr 17 min
1,110 mi to Dallas
From Salt Lake City
20 hr 57 min
999 mi to Dallas
Salt Lake City has the shorter trip; the split is off by about 2 hr 20 min. The alternatives below can even it out. Miami and Salt Lake City are about 2,088 miles apart.
Miami and Salt Lake City are about 2,088 miles apart by road. Split the difference and you arrive near Dallas, the city closest to the halfway point between them. That puts roughly 23 hr 17 min of driving on the Miami side and 20 hr 57 min on the Salt Lake City side — the fairest single meeting point among the cities near the middle.
Over this distance most people will fly rather than drive the whole way. Dallas still makes a fair, central place for Miami and Salt Lake City to converge, splitting the travel instead of asking one side to cross the country.
If Dallas doesn't have what you're after, Oklahoma City and Austin are also close to the midpoint and worth a look — each keeps the drive reasonably balanced between Miami and Salt Lake 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 →
Miami is a coastal city in the U.S. state of Florida. It is the second-most populous city proper in Florida, with a population of 442,241 at the 2020 census. Read more →
Salt Lake City, often shortened to Salt Lake or SLC, is the capital and most populous city of the U.S. state of Utah. It is the county seat of Salt Lake County, the most populous county in the state. 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.