Reagan-National

$104+ Cheap flights from Ontario (ONT) to Reagan-National (DCA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DCA
Jul 7 — Jul 141
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Cheapflights Tip: The best prices from Ontario to Washington, D.C. Reagan-National are usually found in February or September, booked 29 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

Cheap flight deals from Ontario to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Reagan-National (DCA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 2, 2025.

Round-trip from

$241
(Trip.com)

One-way from

$104
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$388
From Ontario to Washington, D.C. Reagan-National
One-way flight from Ontario to Washington, D.C. Reagan-National
Highest demand for flights based on searches. 12% potential increase in price ($54 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Average for round-trip flights in July 2025

Find flight deals from Ontario to Reagan-National

Cheapest flights from Ontario to Reagan-National
Explore the most affordable flight options available from Ontario to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

This Trip.com deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2112:59 amONT - DCA
1 stop8h 05mFrontier
Wed 8/137:00 amDCA - ONT
1 stop19h 50mFrontier
Deal found 7/2$241
This Delta deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1411:45 amONT - DCA
1 stop9h 01mDelta
Tue 8/196:00 amDCA - ONT
1 stop7h 35mDelta
Deal found 7/1$299
This Southwest deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/56:45 amONT - DCA
1 stop9h 10mSouthwest
Mon 8/114:40 pmDCA - ONT
2 stops8h 20mSouthwest
Deal found 7/2$304

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Reagan-National that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
Use the filters below to find and compare flights from Ontario to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Ontario

Fly to

Reagan-National

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 7/21

12:59 am-12:04 pm

1 stop8h 05m

Washington, D.C. Reagan-National

Wed 8/13

7:00 am-11:50 pm

1 stop19h 50m

$241

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 8/14

11:45 am-11:46 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Mon 8/18

5:20 pm-11:40 pm

1 stop9h 20m

$299

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 8/5

11:55 am-11:10 pm

1 stop8h 15m

Washington, D.C. Reagan-National

Mon 8/11

4:40 pm-10:00 pm

2 stops8h 20m

$304

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 8/15

12:59 am-12:04 pm

1 stop8h 05m

$108

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 8/14

11:45 am-9:48 pm

1 stop7h 03m

$150

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 10/22

1:00 pm-12:59 am

2 stops8h 59m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Ontario to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington, D.C. Reagan-National Airport

How far ahead should I book a flight from Ontario to Washington, D.C. Reagan-National Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Reagan-National. Price data was last updated on June 27, 2025.

Booking 29 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Washington, D.C. Reagan-National Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Washington, D.C. Reagan-National Airport?

Currently, February is the cheapest month in which you can book a flight from Ontario to Washington, D.C. Reagan-National Airport (average of $278). Flying from Ontario to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to DCA?

Find hourly flight availability from Ontario to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

When flying from Ontario to Washington, D.C. Reagan-National Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 48% versus a flight at noon.

What is the cheapest day to fly from Ontario to Washington, D.C. Reagan-National Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Reagan-National. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Washington, D.C. Reagan-National Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Reagan-National. Reviews last updated July 2, 2025.
Read through reviews of airlines operating flights from Ontario to Washington, D.C. Reagan-National Airport, such as Delta and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
8.0
Very good
8.0
Very good

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
8.0
Very good

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Ontario to Washington, D.C. Reagan-National?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Washington, D.C. Reagan-National. You should not have trouble finding flights to Washington, D.C. Reagan-National from Ontario; the airport handles an average of 0 outbound flights to Washington, D.C. Reagan-National per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Ontario airport to Washington, D.C. Reagan-National. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • What are the cheapest airlines flying from Ontario to Washington, D.C. Reagan-National Airport round-trip?

    Frontier, at $241, was found to be the cheapest airline from Ontario to Washington, D.C. Reagan-National Airport. An alternate airline flying to your destination would be Delta. You may be able to fly from Ontario to Washington, D.C. Reagan-National Airport for 37% less than the average price by searching for these airlines.

  • Can I find deals for flights from Ontario to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Ontario to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Reagan-National?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Reagan-National.

  • Can I find deals for business class flights from Ontario to Reagan-National?

    Yes. Cheapflights offers flight deals from Ontario to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Washington, D.C. Reagan-National Airport?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Washington, D.C. Reagan-National Airport (average of $278). Flying from Ontario to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Ontario to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Ontario to Reagan-National

Discover the top 5 airlines that operate flights from Ontario to Reagan-National. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$146Average$297FlexibilityNo cancel feeOn-time62%
DeltaCheapest$286Average$433FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$316Average$534FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$322Average$444FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$468FlexibilityNo cancel feeOn-time63%

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