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Cheap IAD to ONT Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Washington to Ontario route information

Origin Airport Washington Dulles Intl.
Destination Airport Los Angeles - Ontario Intl.
Airlines Serving Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Flight Price $177
Distance 2,236 mi

Orange County


Long Beach


Los Angeles




Cheap IAD to ONT Flights

  • Question : Which airline has the least delays from Dulles to Ontario?
    Answer : Booking with United Airlines means you will arrive to Ontario pretty close to the time your ticket states. In fact, this timely airline has a 100% on-time average.
  • Question : How long does the average person stay in Ontario?
    Answer : Of course, you are not an average person, but if you were, you'd stay around one week.
  • Question : Can I change the date of my flight?
    Answer : Yes, you can adjust your departure date. If you would like to save a little money in doing so, the lowest-cost day to fly in July is Wednesday.
  • Question : How much is a plane ticket to Ontario (ONT) from Dulles (IAD)?
    Answer : Cost can range from $173 to $1,138, prices for IAD to ONT do fluctuate more than most routes in the United States. The further out you reserve your ticket, the more likely you are to save.
  • Question : What is the cheapest day to fly?
    Answer : The cheapest day to fly from Dulles to Ontario is on Wednesday. So, if you would like to save some cash on your next flight look for flights on that day.
  • Question : What is the cheapest airline flying from Dulles to Ontario?
    Answer : Frontier Airlines is offering the best deal at $173. Better take a look quickly because prices range all the way up to $1,138 over the next three months.
  • Question : What is the cheapest day to fly to Ontario?
    Answer : Jul 17th has bookings (as of Jun 17th) for as little as $215. That comes in 52% below the average price for this route. Saving now gives you more cash to spend on your trip.