The fair place to meet is Oklahoma City, OK — the city closest to the midpoint of Boise and Orlando. From the farther side that’s about 23 hr 54 min of driving.
Recommended midpoint
Oklahoma City, OK
From Boise
23 hr 54 min
1,140 mi to Oklahoma City
From Orlando
22 hr 11 min
1,058 mi to Oklahoma City
Orlando has the shorter trip; the split is off by about 1 hr 43 min. The alternatives below can even it out. Boise and Orlando are about 2,184 miles apart.
Boise and Orlando are about 2,184 miles apart by road. Split the difference and you arrive near Oklahoma City, the city closest to the halfway point between them. That puts roughly 23 hr 54 min of driving on the Boise side and 22 hr 11 min on the Orlando 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. Oklahoma City still makes a fair, central place for Boise and Orlando to converge, splitting the travel instead of asking one side to cross the country.
If Oklahoma City doesn't have what you're after, Dallas and Kansas City are also close to the midpoint and worth a look — each keeps the drive reasonably balanced between Boise and Orlando.
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 →
Boise is the capital and most populous city in the U.S. state of Idaho. It is the county seat of Ada County. The population of the city was 235,685 at the 2020 census. Read more →
Orlando is a city in and the county seat of Orange County, Florida, United States. Part of Central Florida, it is the fourth-most populous city in the state and its most populous inland city, with a population of 307,573 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.