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).
556 miles
It is close to 609 miles from Austin Texas to Albuquerque New Mexico
The driving distance from Dallas, Texas to Mexico City, Mexico is about 1,132 miles or 1822 km
The driving distance from Dallas, Texas to Guadalajara, Mexico is about 1,043 miles.
The driving distance from Fort Worth, Texas to Cancun, Mexico is about 2,127 miles.
The driving distance from Dallas, Texas to Mescalero, New Mexico is 600 miles.
It is 774.41 miles according to Mapquest.
The driving distance from Austin, Texas to Las Cruces, New Mexico is 624 miles (about 9 hours behind the wheel).
The driving distance from Mexico City, Mexico to Tequisquiapan, Mexico is about 120 miles.
10 hrs i believe if i remember correctly
It is 758.38 miles according to MapQuest.
1200 miles