The driving distance between Houston, TX and Orlando, FL is approximately 965 miles. The driving time would be approximately 16 hours if you were to travel non-stop in good driving conditions. (The driving time does not take into consideration conditions which may extend trip time such as weather, road work, border crossings and rush hour traffic in urban areas.)
13 and 1/2 to 14 hours
I can't find an Orlando in Texas. The one in Florida is 500 miles or 7 hours from Mobile.
18 hours
1,125 miles - it will take about 17 hours to get from Orlando,FL to Austin,TX.
From Austin to Orlando mapquest estimated about 17.5 hours.
It is 1,145 miles according to Google Maps.
The distance from Houston, Texas to Destin, Florida is 573 miles and takes approximately 9 hours and 3 minutes.
about 18 hours non stop
The estimated driving time from La Feria, Texas to Orlando, Florida is less than a day at 19 hours and 24 minutes. There are 1296.97 miles between the two cities.
Aprox. 17 hours 29 mins Sources: http://maps.google.com/
MapQuest gives the estimated driving time as 20 hours and 15 minutes.
MapQuest estimates the driving time as 17 hours and 48 minutes.