Interstate 635 (I-635) is a connector highway between I-35 in Overland Park, Kansas, and I-29 in Kansas City, Missouri, approximately 12 miles (19 km) long. It is mostly in the US state of Kansas, servicing the city of Kansas City, Kansas, but extends into Kansas City, Missouri, as well. The freeway's southern terminus is at a stack interchange with I-35. South of this, the mainline becomes an expressway carrying U.S. Route 69 (US 69).

Interstate 35 (I-35) is an Interstate Highway in the US that runs from the Mexican border near Laredo, Texas, to Duluth, Minnesota. In Kansas, the highway goes from the Oklahoma border to Kansas City at the Missouri border, with a length of 235 miles (378 km). Along the way, I-35 passes through Wichita, the state's largest city, linking it to Emporia, Ottawa, and Kansas City and its Johnson County suburbs. The section of the route from the Oklahoma border to I-335 is part of the Kansas Turnpike.