Cheap flights from Ontario to United States

Travel > North America > United States

Check our current prices for flights from Ontario to United States. 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 Ontario to United States, you will need to run a search below.

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From $154 / RT details

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Cheap Saint Louis airfares from $154/RT are provided by Cheapoair.com. Outbound flight is leaving on 11/23/2024, 10:52 pm from Ontario Int`l (ONT) airport and arrives at St. Louis Intl (STL) at 09:17 pm. The flight time is 22 hours and 25 minutes. The Returning flight departes on 12/04/2024, 07:29 pm (other return dates are also available). Date posted: 28 Sep 2024

Price evolution for flights From Ontario To United States

Recent Deals on Flights from Ontario to United States:Roundtrip / Oneway

• $154 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	11/23/2024	10:52 pm
  Saint Louis, MO (STL)	Ontario, CA (ONT)	12/04/2024	07:29 pm

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• $178 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	11/26/2024	12:00 pm
  Saint Louis, MO (STL)	Ontario, CA (ONT)	12/03/2024	07:29 pm

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• $184 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	02/05/2025	07:45 am
  Detroit, MI (DTW)	Ontario, CA (ONT)	02/19/2025	12:25 pm

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• $184 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	02/25/2025	01:32 pm
  Detroit, MI (DTW)	Ontario, CA (ONT)	03/04/2025	01:11 pm

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• $196 Multiple Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Miami, FL (MIA)	12/06/2024	10:39 am
  Miami, FL (MIA)	Ontario, CA (ONT)	12/20/2024	07:30 am

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• $65 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	01/14/2025	07:45 am

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• $65 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	12/12/2024	06:45 am

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• $65 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	12/16/2024	06:34 pm

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• $69 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	12/10/2024	12:49 am

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• $71 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	San Antonio, TX (SAT)	11/22/2024	10:05 pm

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