East Tennessee has several important transportation links with Middle and West Tennessee, as well as the rest of the nation and the world, including several major airports and interstates. Knoxville's McGhee Tyson Airport (TYS) and Chattanooga's Chattanooga Metropolitan Airport (CHA), as well as the Tri-Cities' Tri-Cities Regional Airport (TRI), provide air service to numerous destinations. I-24, I-81, I-40, I-75, and I-26 along with numerous state highways and other important roads, traverse the Grand Division and connect Chattanooga, Knoxville, and the Tri-Cities, along with other cities and towns such as Cleveland, Athens, and Sevierville.