An airport terminal with a control tower, a covered walkway, and multiple jet bridges.

CA $239 Cheap Flights from Ontario Intl. Airport (ONT) to Washington (DCA)

View CA $239 flight on Sat, Aug 29, 2026Opens in a new window

Popular airlines from Ontario Intl. Airport (ONT) to Ronald Reagan National Airport (DCA)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Ontario Intl. Airport (ONT) to Washington (DCA)

Prices were available within the past 7 days and start at CA $239 for one-way flights and CA $510 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $510 Roundtrip, found 16 hours ago
CA $510
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $510 found 16 hours ago
Delta
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $606 Roundtrip, found 16 hours ago
CA $606
Roundtrip
found 16 hours ago
Select Delta flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $606 found 16 hours ago
American Airlines
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $647 Roundtrip, found 16 hours ago
CA $647
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $647 found 16 hours ago
American Airlines
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $665 Roundtrip, found 16 hours ago
CA $665
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $665 found 16 hours ago
American Airlines
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $745 Roundtrip, found 16 hours ago
CA $745
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $745 found 16 hours ago
Delta
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $761 Roundtrip, found 16 hours ago
CA $761
Roundtrip
found 16 hours ago
Select Delta flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $761 found 16 hours ago
American Airlines
Sat, Sep 5 - Sat, Sep 12
ONT
Ontario
DCA
Washington
CA $801 Roundtrip, found 16 hours ago
CA $801
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Sep 5 from Ontario to Washington, returning Sat, Sep 12, priced at CA $801 found 16 hours ago
Alaska Airlines
Mon, Oct 12 - Mon, Oct 19
ONT
Ontario
DCA
Washington
CA $1,085 Roundtrip, found 1 day ago
CA $1,085
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Oct 12 from Ontario to Washington, returning Mon, Oct 19, priced at CA $1,085 found 1 day ago
Alaska Airlines
Thu, Sep 24 - Sun, Sep 27
ONT
Ontario
DCA
Washington
CA $1,098 Roundtrip, found 4 days ago
CA $1,098
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep 24 from Ontario to Washington, returning Sun, Sep 27, priced at CA $1,098 found 4 days ago
Alaska Airlines
Mon, Oct 12 - Mon, Oct 19
ONT
Ontario
DCA
Washington
CA $1,112 Roundtrip, found 1 day ago
CA $1,112
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Oct 12 from Ontario to Washington, returning Mon, Oct 19, priced at CA $1,112 found 1 day ago

Find the cheapest month to fly from Ontario (ONT) to Washington (DCA)

February is typically the cheapest month to fly

From CA $210 - CA $476 per traveller.

Frequently asked questions

How much does a flight from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) cost?
You can find one-way and return flights from ONT to DCA with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when ONT to DCA ticket fares go up or down.
What is the cheapest month to fly from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
If you're looking for the cheapest time to fly from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National), August is typically your best bet. You can expect average return flight prices around CA$529 during this month. Other budget-friendly months to consider for this route include May and September.
Which airlines fly direct from Ontario Intl. Airport (ONT) 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 Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
Southwest Airlines is one of the cheapest airlines offering connecting flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National), with return tickets starting from around CA$225 for flights that can be booked for departure within the next year. These flights typically include a layover in Sky Harbor Intl. (PHX). 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.
How do I find cheap flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
To find a cheap flight from Ontario Intl. Airport (ONT) 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 Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
The cheapest time to fly from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) is typically August or September, with return flights averaging around CA$529. These months can be a great option for finding more affordable fares, allowing you to save on your trip.
How many flights per day from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
There are approximately 43 connecting flights per day from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National). Some common connection points include Seattle - Tacoma Intl. (SEA), Sky Harbor Intl. (PHX), and Dallas-Fort Worth Intl. (DFW).
What is the earliest flight from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
The earliest flight from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) typically departs around 12:55 AM. This flight is operated by American Airlines. This is a seasonal service, active only in September. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
You'll generally find the most flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) on a Thursday, with around 37 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and Alaska Airlines. Flight schedules are quite consistent throughout the week, so you'll have plenty of options no matter which day you choose to fly.
What are the most popular departure times for flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
The most popular departure times for flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) are in the early morning, from 6am to 9am. Many major carriers, including American Airlines, Southwest Airlines and United, offer flights during this window. Many travellers prefer these times because it allows for an early start to their travel day, getting them to their destination with plenty of time left in the day.
How long does it take to fly from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
There are no nonstop flights from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National). For flights with one stop, you can expect the journey to take around 7 hours, covering a distance of approximately 3,635 kilometres. Flights with two or more stops typically take longer, averaging about 10 hours 18 minutes. Keep in mind that actual travel times can vary based on your specific routing, layover duration, and factors like wind patterns.
Can you fly business or first class from Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
Yes, you can fly business class or first class between Ontario Intl. Airport (ONT) and Washington, DC (DCA).Airlines that offer business class service on this route include: Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, United, Delta, and American Airlines.
How do I earn miles on a Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) flight with Expedia?
It's easy to earn miles on a Ontario Intl. Airport (ONT) 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, DC (DCA) from Ontario Intl. Airport (ONT)?
If you're planning to travel to Washington from Los Angeles - Ontario Intl. (ONT), you can fly directly into Ronald Reagan Washington National (DCA) which offers international flights and connections. Some flights may connect through major hubs like Denver Intl. (DEN), Sky Harbor Intl. (PHX), or 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 Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) at the last minute?
Typically, booking a last minute flight from Ontario Intl. Airport (ONT) 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 Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) flight and hotel package?
Securing a Ontario Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National) flight and hotel package 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 Intl. Airport (ONT) to Washington, DC (DCA-Ronald Reagan Washington National)?
If you booked your Ontario Intl. Airport (ONT) 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
American Airlines, Delta
Roundtrip price
CA $510
Distance
3614 km

Book with confidence

Los Angeles to Washington Flights

The easy way to book your flights from Ontario Intl. Airport to Washington 

With Expedia, it’s simple to find and book flights to Washington from Ontario Intl. Airport whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Ronald Reagan Washington National, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ontario Intl. Airport to Washington today, tomorrow, or this week.  

 

Save dollars with cheap flights from Ontario Intl. Airport, ONT to Ronald Reagan Washington National, DCA 

Sort your search results by price to find great deals on your flight from Ontario Intl. Airport to Washington—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Washington from Ontario Intl. Airport currently is just CA $510 rising to CA $1,112.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Washington  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Washington from Ontario Intl. Airport 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Washington with Expedia today.

Los Angeles to Washington Flights

Explore a world of travel with Expedia

*Available to Expedia members.