Cheap flights from Ontario, CA to Washington DC

Travel > North America > United States > Ontario, CA to Washington DC flights

Check our current prices for flights from Ontario, CA to Washington DC. 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, CA to Washington DC, you will need to run a search below.

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From $140 / RT details

Book your flight now with Cheapoair.com and save!

Cheap Washington DC airfares from $140/RT are provided by Cheapoair.com. Outbound flight is leaving on 03/25/2025, 12:59 am from Ontario Int`l (ONT) airport and arrives at Reagan National (DCA) at 12:03 pm. The flight time is 11 hours and 4 minutes. The Returning flight departes on 04/08/2025, 07:00 am (other return dates are also available). Date posted: 02 Feb 2025

Price evolution for flights From Ontario, CA To Washington DC

Recent Deals on Flights from Ontario, CA to Washington DC:Roundtrip / Oneway

• $140 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (DCA)	03/25/2025	12:59 am
  Washington DC, DC (DCA)	Ontario, CA (ONT)	04/08/2025	07:00 am

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• $156 Multiple Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (DCA)	03/11/2025	12:59 am
  Washington DC, DC (DCA)	Ontario, CA (ONT)	03/21/2025	06:30 am

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• $180 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (DCA)	03/18/2025	12:59 am
  Washington DC, DC (DCA)	Ontario, CA (ONT)	04/01/2025	07:00 am

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• $507 Multiple Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (IAD)	06/06/2025	02:32 pm
  Washington DC, DC (IAD)	Ontario, CA (ONT)	06/09/2025	08:00 am

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• $70 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (DCA)	03/25/2025	12:59 am

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• $70 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (DCA)	04/03/2025	12:59 am

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• $156 Frontier Airlines 

  From	To	Departure	Time
  Ontario, CA (ONT)	Washington DC, DC (DCA)	04/18/2025	12:59 am

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