The Texas Eagle is a long-distance passenger train operated daily by Amtrak on a 1,306-mile (2,102 km) route between Chicago, Illinois, and San Antonio, Texas, with major stops in St. Louis, Little Rock, Dallas, Fort Worth, and Austin. Three days per week, the train joins the Sunset Limited in San Antonio and continues to Los Angeles via El Paso and Tucson. The combined 2,728-mile (4,390 km) route is the longest in the United States and the second-longest in the Americas, after the Canadian.

The Long Distance Service Line is the division of Amtrak responsible for operating all intercity passenger train services in the United States longer than 750 miles (1,210 km). There are fifteen such routes as of 2023, serving over 300 stations in 39 states.