A conversational understanding of Spanish will aid you greatly during your visit, as few SLP citizens will fluently speak English. Indeed, it is a very chic city for learning the Spanish language without being distracted by the English of tourists.
Aeropuerto de San Luis Potosi (IATA: SLP) is a small, compact airport with just two gates: they have a limited range of commercial scheduled flights. From the U.S., direct flights are available on American to Dallas and on United to Houston. Non-stop flights are also available to Mexico City, and Tijuana.
The overnight buses leave Austin, San Antonio or Laredo each night. They arrive in SLP around lunch time the next day. Most popular international line would be Grupo Senda / Turimex -- a 5 minute cab ride from Austin Airport.
The bus station (Central Camionera) is 2 1/2 km from the centre, so you will need to catch a taxi or city bus to the centre - any ‘Centro’ bus will take you there. If you take a taxi buy a ticket from the booth inside the bus station.
Stroll through the Centro Histórico while the sun is fading and you will be able to take amazing photos of the beautiful architecture. During holiday periods (Christmas and Easter) there are twilight light shows in Plaza de Armas and Plaza de los Fundadores. It is a festival atmosphere with lots of people mingling in the plazas and surrounding streets. Stall holders sell colourful balloons and Mexican street snacks like corn-on-the-cob with cheese, butter, salt and lime.
Get yourself a bike and join the night round (rodada nocturna) that goes around the city, starting from Tequis garden each thursday at 9:00 PM or rent a bike on Parque Tangamanga and have a nice peaceful ride.
Centro Histórico SLP has many shops and markets where you can buy Mexican handicrafts, fresh produce and pretty much anything else. Start at Plaza de Las Armas and walk north along Miguel Hidalgo. There is pedestrian mall followed by the Mercado Hidalgo.
San Luis Potosi has many good restaurants in the downtown area. Walk up Venustiano Carranza and you will find many of the city's top culinary gems.
La Corriente, V. Carranza 700: Eclectic atmosphere and a lively happy hour are reason enough to seek out this traditional Mexican restaurant, but the excellent comida corrida for 45 pesos is a lunch-time bargain.
La Virreina, V. Carranza 830: Elegant traditional dining room with suave white-glove service at every turn. The menu is innovative with many nouveau Mexican dishes colored with the splash of old style tradition. Their tortilla soup is spectacular, sprinkled with diced dry cascabel chile, and their truta en cilantro puts a unique spin on an already spectacularly prepared and presented broiled fish dinner.
La Gran Via, V. Carranza 560: Sophisticated elegance with live piano music at both lunch and dinner. The menu is heavy on Spanish classic dishes (including an outstanding paella, loaded with seafood and redolent with saffron). They also have a smattering of exciting nouveau Mexican fusions, equally well prepared, and their cream of artichoke soup is a culinary delight.
El Angel, V. Carranza 1625. About a mile out from downtown is this bright star of innovative nouveau Mexican cuisine. Even the vegetables are worth raving about here: the smoky depth of my plate of grilled nopales with chipotle was nothing short of an orgasm for my tongue.
La Fragua Steak Taco, About a mile out from downtown past Hotel Real Plaza on a side street from Carranza. The ultimate taco and beer joint. Lunch Dinner or to soak up the alcohol this place is always great. Phone number:(444) 8175425
Gorditas de Morales, Camino a la presa de San Jose (22.150978,-101.02029) , (behind Juan H Sanchez Park). This street is packed with about 20 different small restaurants, all with their own version of gorditas, some offer soups and other typical dishes. A rule of thumb is to walk around, take a look and get in the one with more customers. But since the competition is tight, the quality is generally good and you will hardly go wrong making a choice.
Gorditas de Horno, Calle del Arbol (about number 11, one block away from Gorditas de Morales). Open only on weekends. Arrive early as the queue can be very long at times. These gorditas are thick and cooked in an oven. Different from the ones sold in bicycle stands. This are not served in a bag full of salsa, but they are way softer and richer in flavor (not necessarily spicy).
San Luis Potosi is packed with mobile eateries, either bicycles, small carts, or even trucks. Some of them get a fixed position once in a while, but it is very normal to find them on the go. Here is a list of some of the typically available foods on offer:
Corn. Either on the cob or loose this is very different from the yellow corn you are used to. Mexican corn is white and not sweet, but has a delicious flavor of its own. You can get it with a combination of the following ingredients: butter, cream, cheese, mayonnaise, lime, powder chili and salt. You can just ask for a recommendation from the seller.
Tamales. Stuffed corn bread, covered in corn leaves. Gerneral advice about eating in the street in Mexico: If your stomach is too picky and you are afraid you may get sick then go for this safe thing. Tamales are cooked in steam for a long time and served to you inside a corn husk that covers the whole thing. Therefore, in practice, you receive an sterile product.
Tacos sudados. Tacos prepared very early in the morning are put in big thermal containers to keep them warm and sold for breakfast or lunch. You will see a cloud of people moving around the good places: Tacos Oscar, Av Himno Nacional 4005 (Ouside Plaza Fiesta). Benigno Arriaga and Av. Himnno Nacional (22.139038,-100.989697).
Gorditas de Horno. Stuffed with tasty savory fillings and soaked in a hot salsa. Look for the yellow tricycles with a fishtank full of gorditas in the front.
Be sure to find La Calle San Francisco (near the church by the same name) in the city's downtown sector. There are some outstanding cafes and clubs in this area. Look for those with the rooftop locations. They have the charm of brick-covered alleys and spectacular starlit views in the evening. Some also feature live music.
Chain hotels and moderate hotels are mostly located in the "Zona Hotelera", just outside the city, on the highway near the bus station. Inexpensive independent hotels are mostly downtown. The only luxury hotel in town is the Westin.
For budget travellers the area between the railway station and the cathedral has many cheap hotels. If you are looking for a spartan room and share bathroom for M$80 a night try the hotels along Calle Jiménez- beside Plaza del Mariachi.