Cheap flights from Washington DC to Ontario, CA
Travel > North America > United States > Washington DC to Ontario, CA flights
Travel tip: Visit Ontario on your holidays!Check our current prices for flights from Washington DC to Ontario, CA. 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 Washington DC to Ontario, CA, you will need to run a search below.
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Cheap Ontario airfares from $331/RT are provided by Cheapoair.com. Outbound flight is leaving on 08/08/2025, 06:00 pm from Reagan National (DCA) airport and arrives at Ontario Int`l (ONT) at 09:09 am. The flight time is 15 hours and 9 minutes. The Returning flight departes on 08/19/2025, 12:59 am (other return dates are also available). Date posted: 30 Jun 2025
Price evolution for flights From Washington DC To Ontario, CA
Recent Deals on Flights from Washington DC to Ontario, CA:Roundtrip / Oneway
- $331
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Washington DC, DC (DCA) Ontario, CA (ONT) 08/08/2025 06:00 pm Ontario, CA (ONT) Washington DC, DC (DCA) 08/19/2025 12:59 am - $432
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Washington DC, DC (DCA) Ontario, CA (ONT) 08/08/2025 06:30 am Ontario, CA (ONT) Washington DC, DC (DCA) 08/19/2025 12:59 am - $138 Frontier Airlines
cheapoair.com check priceFrom To Departure Time Washington DC, DC (DCA) Ontario, CA (ONT) 07/31/2025 07:00 am - $243
Jetblue Airways
cheapoair.com check priceFrom To Departure Time Washington DC, DC (DCA) Ontario, CA (ONT) 07/31/2025 06:30 am
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