The state has approximately of highway with 10,857 federally maintained and 11,660 maintained by the state. Almost all of these kilometers are paved. Major highways include the Las Choapas-Raudales-Ocozocoautla, which links the state to Oaxaca, Veracruz, Puebla and Mexico City. Major airports include Llano San Juan in Ocozocoautla, Francisco Sarabia National Airport (which was replaced by Ángel Albino Corzo International Airport) in Tuxtla Gutiérrez and Corazón de María Airport (which closed in 2010) in San Cristóbal de las Casas. These are used for domestic flights with the airports in Palenque and Tapachula providing international service into Guatemala. There are 22 other airfields in twelve other municipalities. Rail lines extend over 547.8 km. There are two major lines: one in the north of the state that links the center and southeast of the country, and the Costa Panamericana route, which runs from Oaxaca to the Guatemalan border.