Cheap flights from Washington to Saint Louis

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Most recognized companies in the US have their headquarters in Saint Louis. It has more than 40 Fortune-1000 companies and currently ranks 4th in terms of the number of Fortune-500 companies in the US. Due to the presence of colleges and industries based on healthcare, the city is considered one of the best centers for biotechnology and medicine. With companies like Pfizer having one of their top research centers in this city, it is the place to be for medical aspirants.... (read more in our Saint Louis Travel Guide)

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Cheapest flights found for the next 6 months

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Seattle 

Check our newest flight offers to Saint Louis:

  • $158Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Seattle, WA (SEA)Saint Louis, MO (STL)12/05/202401:40 pm
    Saint Louis, MO (STL)Seattle, WA (SEA)12/16/202406:46 pm
    cheapoair.com check price
  • $243Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Seattle, WA (SEA)Saint Louis, MO (STL)11/10/202409:53 pm
    Saint Louis, MO (STL)Seattle, WA (SEA)11/24/202405:38 pm
    cheapoair.com check price
  • $253Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Seattle, WA (SEA)Saint Louis, MO (STL)11/26/202409:09 am
    Saint Louis, MO (STL)Seattle, WA (SEA)12/07/202408:00 pm
    cheapoair.com check price
  • $548Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Seattle, WA (SEA)Saint Louis, MO (STL)12/02/202412:03 pm
    Saint Louis, MO (STL)Seattle, WA (SEA)12/15/202408:34 pm
    cheapoair.com check price
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