Cheap Flights from Washington (DCA) to Ontario (ONO)

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal)

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Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal) cost?
Grab a cheap one-way flight or cheap return flight from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal)?
is the least expensive month to fly from DCA to ONO. Planning your trip for the off-season is often the key to finding better fares.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from DCA to ONO. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal)?
Direct flights from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DCA to ONO?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary based on a number of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal)?
Choose a flight from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal) last-minute?
Booking your ticket from DCA to ONO just before your trip is generally more expensive. However, if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a DCA to ONO flight and hotel package?
Compared with arranging flights and hotels separately, booking a DCA to ONO flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one easy place will take the stress out of planning your trip. Simply secure your flights and choose from our wide range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Ontario, OR (ONO-Ontario Municipal)?
If you booked your DCA to ONO flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
Ontario Municipal
Distance
2079 mi

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Washington to Ontario Flights

The cheapest times to fly from Washington to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Ontario are during the month of . You can find some of the cheapest flights from Washington to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Ontario

Sunday is one of the best days to book for cheap flights from Washington to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Ontario in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Ontario Flights

*Flight schedules are subject to change.

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