Cheap flights from Illinois to Saint Louis

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Saint Louis is located on the border linking humid subtropical and humid continental climate. The absence of large water bodies and mountains leads to failing in moderating its temperature. Both the Gulf of Mexico’s hot & humid tropical air and the Canadian Arctic’s cold one mainly affect this region.... (read more in our Saint Louis Travel Guide)

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Cheapest flights found for the next 6 months

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Chicago 

Check our newest flight offers to Saint Louis:

  • $251Southwest Airlines flight Southwest Airlines 
    FromToDepartureTime
    Chicago, IL (MDW)Saint Louis, MO (STL)12/20/201603:20 pm
    Saint Louis, MO (STL)Chicago, IL (MDW)12/30/201606:00 am
    flyfar.ca check price
  • $252Southwest Airlines flight Southwest Airlines 
    FromToDepartureTime
    Chicago, IL (MDW)Saint Louis, MO (STL)12/20/201603:20 pm
    Saint Louis, MO (STL)Chicago, IL (MDW)12/30/201606:00 am
    flightnetwork.com check price
  • $256Southwest Airlines flight Southwest Airlines 
    FromToDepartureTime
    Chicago, IL (MDW)Saint Louis, MO (STL)12/19/201603:20 pm
    Saint Louis, MO (STL)Chicago, IL (MDW)12/27/201608:55 pm
    flyfar.ca check price
  • $257Southwest Airlines flight Southwest Airlines 
    FromToDepartureTime
    Chicago, IL (MDW)Saint Louis, MO (STL)12/19/201603:20 pm
    Saint Louis, MO (STL)Chicago, IL (MDW)12/27/201608:55 pm
    flightnetwork.com check price
  • $257Southwest Airlines flight Southwest Airlines 
    FromToDepartureTime
    Chicago, IL (MDW)Saint Louis, MO (STL)12/12/201603:20 pm
    Saint Louis, MO (STL)Chicago, IL (MDW)12/20/201606:05 am
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