If your trip to Sao Luis (SLZ-Marechal Cunha Machado Intl.) is all locked in but your itinerary is a bit on the empty side, we can give you a few hints and tips.
Travelers from all over the place come to see Palacio das Lagrimas, so make it one of your first stops after you touchdown. Also worth checking out are Sao Joao Batista Church and Sacred Art Museum.
You'll be glad to hear that there's a huge range of both luxury and economy rental vehicles in Sao Luis Airport (SLZ-Marechal Cunha Machado Intl.). What you opt for depends on how much you're willing to spend and what you plan to do. Specialty and prestige vehicles are hard to beat if you're all about mod cons and comfort. If you're splashing out, why not pick an elite SUV, or perhaps a cushy medium-sized sedan? Otherwise, if you just need a set of wheels to get you around town as efficiently as possible, go for an economy compact vehicle (or something else that won't burn a hole in your wallet).