Two ways out of the terminal, JFK Blvd and Will Clayton Pkwy. Take WCP east to US 59, go south. When you get near downtown, get to the right side of the freeway, take the IH 45 south exit. Depending on your Webster exit, you might want to take Eldorado Blvd, Bay Area Blvd, NASA Parkway, (formely NASA Rd 1). From Post Oak back to IAH, depending where you are on Post Oak, get on US 59 north. Stay on 59 past downdown and beyond. Take the Will Clayton Parkway exit and go west to IAH. Easy. http://mapq.st/1ncm7k6
Good point. Post Oak is a LONG road.. From WHERE on Post Oak are you starting??