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 $300 / RT details

Book your flight now with Cheapoair.com and save!

Cheap Detroit airfares from $300/RT are provided by Cheapoair.com. Outbound flight is leaving on 06/04/2025, 12:59 am from Ontario Int`l (ONT) airport and arrives at Detroit Wayne Co (DTW) at 12:41 am. The flight time is -1 hours and -18 minutes. The Returning flight departes on 06/10/2025, 09:54 pm (other return dates are also available). Date posted: 23 Feb 2025

Price evolution for flights From Ontario To United States

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

• $300 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	06/04/2025	12:59 am
  Detroit, MI (DTW)	Ontario, CA (ONT)	06/10/2025	09:54 pm

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• $465 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	06/11/2025	01:19 pm
  Detroit, MI (DTW)	Ontario, CA (ONT)	06/18/2025	01:00 pm

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• $470 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	06/10/2025	07:58 pm
  Detroit, MI (DTW)	Ontario, CA (ONT)	06/17/2025	01:03 pm

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• $570 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	05/14/2025	12:16 pm
  Detroit, MI (DTW)	Ontario, CA (ONT)	05/27/2025	06:00 am

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• $598 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	New York, NY (JFK)	05/21/2025	02:32 pm
  New York, NY (JFK)	Ontario, CA (ONT)	06/03/2025	06:30 am

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• $96 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	05/07/2025	01:19 pm

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• $101 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	06/03/2025	07:58 pm

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• $360 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	06/10/2025	01:19 pm

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• $360 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Detroit, MI (DTW)	05/27/2025	01:19 pm

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