Interstate 240 (I-240) is an Interstate Highway in Oklahoma, United States, that runs 16.22 miles (26.10 km) west from I-40 to I-44 in southern Oklahoma City. After its terminus in southwest Oklahoma City, the main I-240 roadbed becomes I-44 and Airport Road toward Will Rogers World Airport. The Interstate overlaps State Highway 3 (SH-3), the longest Oklahoma state highway, for its entire length.