The halfway point between Minneapolis/St. Paul and Boston is approximately Detroit, Michigan.
Milan, OH
The halfway point between Chicago, Illinois and St. Louis, Missouri is McLean, Illinois according to MeetWays.com.
Walbridge, OH
Hammond, IN
The halfway point between St. Paul and Lynchburg, TN, is on the southeast side of Bloomington, IL, between Bloomington and Champaign on I-74.
Terrell TX, east of Dallas.
If you drive through Chicago, the halfway point between St. Paul and Detroit is just on the northwest side of Chicago, around Merengo, Genoa, and Elgin, Illinois.
The halfway point between Wall, South Dakota, and Saint Paul, Minnesota, is around the area near Worthington, Minnesota. This location is approximately 200 miles from both Wall and Saint Paul, making it a convenient meeting spot. Worthington is accessible via Interstate 90 and offers amenities for travelers.
The halfway points are the points which mark the half distance covered by the flight. These lie in the mid of both the above mentioned places. These points change for different locations. Halfway points for the above mentioned places are - Interstate 20, Clinton, MS 39056.
155 miles
The midway point between Florida (continental US) and the Republic of South Africa would be in the Atlantic Ocean off the coast of Brazil, just south of the equator. The nearest island group is the Saint Peter and Saint Paul Archipelago (naval scientific station only), and the nearest land location is Touros, Brazil.