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 $150 / RT details

Book your flight now with Cheapoair.com and save!

Cheap Saint Louis airfares from $150/RT are provided by Cheapoair.com. Outbound flight is leaving on 01/28/2025, 07:45 am from Ontario Int`l (ONT) airport and arrives at St. Louis Intl (STL) at 09:16 am. The flight time is 1 hours and 31 minutes. The Returning flight departes on 02/05/2025, 07:09 pm (other return dates are also available). Date posted: 22 Nov 2024

Price evolution for flights From Ontario To United States

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

• $150 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	01/28/2025	07:45 am
  Saint Louis, MO (STL)	Ontario, CA (ONT)	02/05/2025	07:09 pm

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• $158 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	New York, NY (JFK)	01/20/2025	09:36 pm
  New York, NY (JFK)	Ontario, CA (ONT)	01/28/2025	07:59 am

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• $164 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	01:00 pm

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• $164 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	02/18/2025	07:58 pm
  Detroit, MI (DTW)	Ontario, CA (ONT)	03/05/2025	01:00 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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• $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)	San Antonio, TX (SAT)	01/23/2025	06:50 pm

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• $75 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	01/22/2025	07:45 am

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• $75 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	02/25/2025	07:58 pm

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• $85 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Saint Louis, MO (STL)	01/24/2025	06:34 pm

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