What is the driving distance from Texas to Mexico?

Answer 1

Mexicans often mean the city of Mexico, DF when they use "Mexico" so I will proceed under that assumption. Since Laredo is the busiest border crossing for cars, I will assume the writer meant Laredo.

There is seldom just one answer to a question like this. There are always at least two ways to get anywhere in Mexico.

The most common route that fits the question is from Laredo to Mexico City. There are two choices. Laredo to Mexico City via mostly four-lane toll roads is 706 miles. The route is: Monterrey - Saltillo (MEX-57) - San Luis Potosí - Querétaro - Mexico. Drive time is 2.5 days.

Laredo to Mexico City via the scenic route of MEX-85 is 752 miles. The route is: Monterrey - Cd. Valles - Pachuca - Mexico. Drive time is 4 days (due to mountainous terrain, two-lane roads, small towns).