Can't be answered w/o knowing where you're travelling from, and how you intend to travel.
The driving distance between Austin, TX and Magnolia, TX is about 133 miles. It takes about 2 hours and 18 minutes to drive the distance.
9
5 to 5 and 1/2 hours
The driving distance between Dallas, TX and Magnolia, TX is 225 miles. The driving time would be approximately 4 hours if driving non-stop in good conditions. (The driving time does not take into consideration conditions such as weather, road work and rush hour traffic in urban areas.)Mapquest says 206 miles
500 hours
24 hours
45 miles
The shortest time is 4 hours and 58 minutes.
Google Maps estimates the driving time as 1 hour and 54 minutes.
The shortest time is 3 hours and 14 minutes.
It takes about 24 hours to reach the center of Montana from Dallas, Tx.
About six hours of driving time to cover that 390 miles.