Interstate 670 is the designation for two tertiary interstate routes in the United States associated with Interstate 70

Kansas-Missouri

Interstate 670 is a 2.81 mile connector highway between I-70 in Kansas City, Kansas and I-70 Kansas City, Missouri. The freeway provides a more direct route through downtown Kansas City.

Ohio

Interstate 670 is a 9.37 mile spur highway that connects I-70 in western Columbus, Ohio to U.S. Highway 62 in Gahanna, Ohio on the east side of Columbus. I-670 also provides access to Port Columbus International Airport. There are junctions with Interstate 71, Ohio State Highway 315 , and Interstate 270. I-670 is co-routed with US-62 from Gahanna to downtown Columbus.