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 $180 / RT details

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Cheap Saint Louis airfares from $180/RT are provided by Cheapoair.com. Outbound flight is leaving on 03/05/2024, 05:19 pm from Ontario Int`l (ONT) airport and arrives at St. Louis Intl (STL) at 09:00 am. The flight time is 15 hours and 41 minutes. The Returning flight departes on 03/13/2024, 07:37 pm (other return dates are also available). Date posted: 13 Feb 2024

Price evolution for flights From Ontario To United States

Price overview for flights from Ontario to United States

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

  • $180Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Saint Louis, MO (STL)03/05/202405:19 pm
    Saint Louis, MO (STL)Ontario, CA (ONT)03/13/202407:37 pm
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  • $190Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Indianapolis, IN (IND)03/26/202407:27 am
    Indianapolis, IN (IND)Ontario, CA (ONT)04/10/202410:54 pm
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  • $190Multiple Airlines flight Multiple Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Detroit, MI (DTW)03/21/202409:25 pm
    Detroit, MI (DTW)Ontario, CA (ONT)04/04/202407:40 pm
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  • $198Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Detroit, MI (DTW)03/13/202405:37 pm
    Detroit, MI (DTW)Ontario, CA (ONT)04/02/202410:05 am
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  • $204Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Saint Louis, MO (STL)03/05/202411:58 pm
    Saint Louis, MO (STL)Ontario, CA (ONT)03/20/202404:35 pm
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  • $85Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Detroit, MI (DTW)04/02/202410:08 pm
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  • $91Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Detroit, MI (DTW)04/24/202405:12 pm
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  • $91Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Durham, NC (RDU)04/17/202407:26 am
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  • $91Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Detroit, MI (DTW)05/01/202410:50 pm
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  • $94Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Detroit, MI (DTW)04/15/202410:56 pm
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