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

How far is Harlingen from San Marcos, Texas?

The distance from Harlingen to San Marcos, Texas is 255.6 miles (411.3 km) as the crow flies. San Marcos, Texas is located N of Harlingen. By car, the driving distance is approximately 319.4 miles, taking about 6h 26min. A direct flight would take roughly 1h 1min. Both are located in United States.

For a drive of this length, it's recommended to plan at least one quick rest stop to stretch your legs and grab a coffee.

Coordinates come from public place data for Harlingen 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.