One last question, if I am back to whitney portal by 2pm Sunday is it feasible to make a 7pm flight out of LAX or would that be cutting it too close?
You might want to look into flights from Ontario to Hobby. SW has a flight leaving at 5:45, and Ontario is much closer (in time) than LAX
Another option is to fly from Las Vegas. Drive time is approx. same as Ontario, but they have a nonstop flight at 8:00 PM
Also, more interesting drive.