Killeen to San Marcos, Texas: Road Trip Guide & Distance

How far is Killeen from San Marcos, Texas?

The distance from Killeen to San Marcos, Texas is 86.2 miles (138.7 km) as the crow flies. San Marcos, Texas is located S of Killeen. By car, the driving distance is approximately 107.7 miles, taking about 2h 10min. A direct flight would take roughly 40min. Both are located in United States.

This is a quick and easy drive, perfect for a day trip or weekend getaway. You can easily make the round trip in a single day. Given the short distance, driving or taking a train is often faster and more convenient than dealing with airport security and flight boarding times.

Coordinates come from public place data for Killeen and San Marcos, Texas. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.