$107 Cheap Flights from Ontario (ONT) to Washington (DCA)

View $107 flight on Sun, May 24, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Ronald Reagan Washington National Airport (DCA)

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Cheap Flights from Ontario to Washington (ONT-DCA)

Prices were available within the past 7 days and start at $107 for one-way flights and $195 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sun, May 24 - Tue, Jun 2
ONT
Ontario
DCA
Washington
$195 Roundtrip, found 1 hour ago
$195
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, May 24 from Ontario to Washington, returning Tue, Jun 2, priced at $195 found 1 hour ago
Frontier Airlines
Sun, May 24 - Thu, May 28
ONT
Ontario
DCA
Washington
$205 Roundtrip, found 8 hours ago
$205
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Sun, May 24 from Ontario to Washington, returning Thu, May 28, priced at $205 found 8 hours ago
Frontier Airlines
Wed, May 20 - Tue, Jun 2
ONT
Ontario
DCA
Washington
$210 Roundtrip, found 1 hour ago
$210
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, May 20 from Ontario to Washington, returning Tue, Jun 2, priced at $210 found 1 hour ago
Frontier Airlines
Sat, May 23 - Thu, May 28
ONT
Ontario
DCA
Washington
$215 Roundtrip, found 5 hours ago
$215
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, May 23 from Ontario to Washington, returning Thu, May 28, priced at $215 found 5 hours ago
Frontier Airlines
Sat, Jun 6 - Sun, Jun 7
ONT
Ontario
DCA
Washington
$220 Roundtrip, found 21 hours ago
$220
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Sat, Jun 6 from Ontario to Washington, returning Sun, Jun 7, priced at $220 found 21 hours ago
Frontier Airlines
Sun, May 24 - Tue, Jun 16
ONT
Ontario
DCA
Washington
$225 Roundtrip, found 6 hours ago
$225
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Sun, May 24 from Ontario to Washington, returning Tue, Jun 16, priced at $225 found 6 hours ago
American Airlines
Fri, May 29 - Tue, Jun 2
ONT
Ontario
DCA
Washington
$276 Roundtrip, just found
$276
Roundtrip
just found
Select American Airlines flight, departing Fri, May 29 from Ontario to Washington, returning Tue, Jun 2, priced at $276 just found
Southwest Airlines
Wed, Jun 3 - Fri, Jun 5
ONT
Ontario
DCA
Washington
$276 Roundtrip, found 4 hours ago
$276
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Wed, Jun 3 from Ontario to Washington, returning Fri, Jun 5, priced at $276 found 4 hours ago
United
Thu, Jul 9 - Mon, Jul 13
ONT
Ontario
DCA
Washington
$316 Roundtrip, found 3 hours ago
$316
Roundtrip
found 3 hours ago
Select United flight, departing Thu, Jul 9 from Ontario to Washington, returning Mon, Jul 13, priced at $316 found 3 hours ago
Delta
Sun, May 24 - Thu, May 28
ONT
Ontario
DCA
Washington
$321 Roundtrip, found 8 hours ago
$321
Roundtrip
found 8 hours ago
Select Delta flight, departing Sun, May 24 from Ontario to Washington, returning Thu, May 28, priced at $321 found 8 hours ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Cheapest option available. Average driving time to city center is 40 minutes. Flights from $245
BWI
Baltimore Washington Intl. Thurgood Marshall
Cheapest
Average driving time to city center40 min
Flights from $245
Select flight to Washington Dulles Intl. IAD. Average driving time to city center is 36 minutes. Flights from $759
IAD
Washington Dulles Intl.
Average driving time to city center36 min
Flights from $759

Frequently asked questions

How much does a flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) cost?
You can find cheap one-way flights and cheap return flights from $195 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) with Expedia. One-way flights usually range from $208 to $1194, and return flights typically cost between $397 and $1514. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
August is the cheapest month to fly from Ontario, CA (ONT) to Washington, DC (DCA), with average return fares around $381. This price is about 17% lower than the average throughout the year, as August typically has lower travel demand. Other economical months include May and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
Enter ONT to DCA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
Southwest Airlines is one of the cheapest airlines offering connecting flights from Los Angeles - Ontario Intl. (ONT) to Ronald Reagan Washington National (DCA), with round-trip tickets starting from around $679 with a layover in Denver Intl. (DEN). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
To find a cheap flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
The ideal months to fly from Ontario, CA (ONT) to Washington, DC (DCA) are August and September. You can expect average return flight prices around $381 in these months. August is popular for travelers, while September offers a quieter experience, allowing you to explore the nation's capital with ease.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
The earliest flight from Ontario (ONT) to Washington, DC (DCA) usually departs at around 12:05 AM local time, operated by Frontier Airlines. This seasonal service is available in May, giving you an early start to your travel plans. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
The most popular departure times for flights from Ontario, CA (ONT) to Washington, DC (DCA) are in the early morning, from 6am to 9am. About 43% of passengers prefer this time window. Many major carriers, including American Airlines and United Airlines, offer flights during this window. This timing is favored as it helps you arrive in Washington, DC, ready to start your day.
How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
A flight from ONT to DCA with a layover takes around 7 hours, with the route covering approximately 2,259 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
First class is available on flights from ONT to DCA. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How do I earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight with Expedia?
It's easy to earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Los Angeles - Ontario Intl. (ONT)?
From Los Angeles - Ontario Intl. (ONT), you can fly into Ronald Reagan Washington National (DCA) and Washington Dulles Intl. (IAD) in Washington. Some flights may connect through major hubs like Denver Intl. (DEN), Sky Harbor Intl. (PHX), Dallas-Fort Worth Intl. (DFW) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) at the last minute?
Typically, booking a last minute flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight and hotel package?
Securing a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) Washington Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
If you booked your Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Ontario Intl. Airport
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$195
Distance
2258 mi

Book with confidence

Ontario to Washington Flights

The cheapest times to fly from Ontario to Washington

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 Ontario to Washington are during the month of May. You can find some of the cheapest flights from Ontario to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Washington

Sunday is one of the best days to book for cheap flights from Ontario to Washington: 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 Ontario to Washington

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 Ontario to Washington in 2026. You can also book with separate airlines for your outbound and return journeys, from $107 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 Ontario to Washington 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 Ontario to Washington 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.

 

Ontario to Washington Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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