It is 408.79 miles and about 6.5 hours according to MapQuest
Google Maps estimates the driving time as 3 hours and 1 minute.
MapQuest estimates the driving time as 3 hours and 42 minutes.
Google Maps estimates the driving time as 3 hours and 57 minutes.
It takes more than 24 hours to travel to Texas form Toronto. When I went there in 2005 we were traveling (with stops) for about two- three days.