Okay I

Ahh Okay Well Im Planning To Travel To Mexico City via Greyhound Tomorrow.(7/7/10) Im supposed to Leave At 08:30am and Get there In 2 Days 10 Hours. But Ive been told These Trips Will Take Longer? I need to be there (Mexico) By Saturday Morning. So Do you Know if these Timings are correct Or Are they Wayy Offf? Please and Thank you. God Bless