AirHint found the following cheapest return flights from Chicago (MDW) to San Luis Potosi (SLP) in March 2026 (see full year).
Return flights
| 05 Mar - 19 Mar | Aeromexico | ||
| 22 Mar - 31 Mar | Aeromexico | ||
| 11 Mar - 19 Mar | Delta | ||
| 07 Mar - 21 Mar | Delta | ||
| 22 Mar - 29 Mar | Frontier Airlines | ||
| 27 Mar - 03 Apr | Aeromexico |
Also check the deals for one-way flights from Chicago to San Luis Potosi in March.
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