Minneapolis-St. Paul International Airport (MSP), also known as Wold-Chamberlain Field, is a major joint civil-military public international airport serving the Twin Cities region of Minneapolis and Saint Paul in Minnesota. The facility is located around 10 miles from the downtown of both Minneapolis and Saint Paul, although it is not located in the city itself or within any school district. The airport is more than 2,930 acres in size, and it is the busiest airport in the Upper Midwest.