It's going to be very, very tight to make it to your flight. It is 70 miles from the port to IAH. It is Monday morning, some of the worst traffic in a city with bad traffic everyday, every hour. There is major construction at the airport and traffic backs up around the area. It can be a long hike from check in to the gate. Finally, if the flight is on time, the door to the plane will probably be closed no later than 11:40. Stress, stress, stress. I wouldn't put myself through it.