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If you are traveling within Mexico, a good source to use is a Mexican government website listed below. It is 612.2 kilometers by auto and the tolls will be $492 pesos. It should take about six hours and forty-six minutes by the route indicated on the site.

To use the site (which is in Spanish) you enter the location in which you begin, and the location to which you are going. The directions will be shown on a map of Mexico and also detailed below that, with a list of locations through which you will be driving and the points at which tolls must be paid.

Monterrey is in the Northern part of Mexico. It borders Texas.

See website below for another city to city mileage service.