U.S. Route 277, is a north-south US Highway. It is an urge of U.S. Route 77. It runs for 633 miles across Oklahoma & Texas. US 277's northern terminus is in Newcastle, Oklahoma at Interstate 44, which is also the northern end of the H.E. Bailey Turnpike. Its southern end is in Carrizo Springs, Texas at U.S. Route 83. It passes throughout the states of Oklahoma & Texas.