Cheap flights from Phoenix to Saint Louis

Travel > North America > United States > Phoenix to Saint Louis flights

Check our current prices for flights from Phoenix to Saint Louis. Please note that we also give you historical search data for this city connection. These are all airfares that people found in the past, in order to find more current flight information from Phoenix to Saint Louis, you will need to run a search below.

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From $140 / RT details

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Cheap Saint Louis airfares from $140/RT are provided by Cheapoair.com. Outbound flight is leaving on 04/08/2025, 11:08 am from Phoenix Intl (PHX) airport and arrives at St. Louis Intl (STL) at 09:06 am. The flight time is 21 hours and 58 minutes. The Returning flight departes on 04/23/2025, 06:55 pm (other return dates are also available). Date posted: 05 Jan 2025

Price evolution for flights From Phoenix To Saint Louis

Recent Deals on Flights from Phoenix to Saint Louis:Roundtrip / Oneway

• $140 Frontier Airlines 

  From	To	Departure	Time
  Phoenix, AZ (PHX)	Saint Louis, MO (STL)	04/08/2025	11:08 am
  Saint Louis, MO (STL)	Phoenix, AZ (PHX)	04/23/2025	06:55 pm

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• $720 Frontier Airlines 

  From	To	Departure	Time
  Phoenix, AZ (PHX)	Saint Louis, MO (STL)	05/27/2025	09:35 am
  Saint Louis, MO (STL)	Phoenix, AZ (PHX)	06/11/2025	09:49 pm

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• $66 Frontier Airlines 

  From	To	Departure	Time
  Phoenix, AZ (PHX)	Saint Louis, MO (STL)	04/16/2025	10:33 pm

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• $86 Frontier Airlines 

  From	To	Departure	Time
  Phoenix, AZ (PHX)	Saint Louis, MO (STL)	04/11/2025	04:49 pm

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