Cheap flights from Illinois to San Luis Potosí from $125

The cheapest month to fly to San Luis Potosí from Illinois is in September. Flight prices, which tend to average around $361, are often lower during this time because this is during the off-season. If you’re not able to fly to San Luis Potosí in September, then February is your next best option. Flight prices from Illinois to San Luis Potosí during February average around $391.

Our data shows that Thursday is the least expensive day to fly to San Luis Potosí. Tickets to fly out on this day can be as low as $355. The most expensive day to fly to San Luis Potosí is Sunday, with ticket prices averaging around $446.

According to our data, the cheapest time of day to fly to San Luis Potosí is in the evening. momondo users have found flights departing from Illinois to San Luis Potosí in the evening for as low as $397. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the afternoon because they tend to be around $597. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Chicago Midway to San Luis Potosi for the best Illinois - San Luis Potosi flight prices

You are more likely to see cheaper flights to San Luis Potosí from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to San Luis Potosí for around $543 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Luis Potosí from Illinois for as low as $375 on momondo.

There is only 1 cabin class available to choose from on Illinois to San Luis Potosí flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Volaris, Frontier, and Aeromexico are the most popular carriers operating from Illinois to San Luis Potosi

Volaris, Viva and United Airlines are the top three most popular airlines that fly to San Luis Potosí from Illinois according to our data. Volaris is the first choice among our users, with 55% of people opting to fly with this airline when traveling to San Luis Potosí. Keep in mind that there are 7 different airlines that fly to San Luis Potosí on a routine basis, so you have a few additional options to choose from.

As of September 2026, there are 4 flights per week flying from Illinois to San Luis Potosí. The most common day of the week flights depart is Tue, with 25% of flights taking off on this day.

If you’re flying from a popular airport in Illinois, such as Chicago or Moline, and flying into San Luis Potosí, then you can expect flight times to average 3h 50m and 6h 46m, respectively.