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Washington, D.C.

$88+ Cheap flights from Ontario (ONT) to Washington, D.C. (WAS)

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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAS
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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1. Tell us where you want to go
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The best prices from Ontario to Washington, D.C. are usually found in February or August, booked 61 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from Ontario to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Washington, D.C. (WAS). 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 November 21, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

February

Round-trip from

$178
(CheapOair)

One-way from

$88
(Trip.com)
Provider with most accurate pricing for Ontario-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Washington, D.C. (WAS) flights.
Search Deals
High demand for flights, 20% potential price rise
Search Deals
Best time to find cheap flights, 27% potential price drop
Search Deals
From Ontario to Washington, D.C. (WAS)
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One-way flight from Ontario to Washington, D.C. (WAS)
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Find flight deals from Ontario to Washington, D.C.

Cheapest flights from Ontario to Washington, D.C.
Explore the most affordable flight options available from Ontario to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This CheapOair deal was found by Cheapflights users on 11/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/126:45 amONT - DCA
1 stop7h 14mFrontier
Sun 12/157:00 amDCA - ONT
1 stop29h 39mFrontier
Deal found 11/20$178
This American Airlines deal was found by Cheapflights users on 11/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:20 amONT - DCA
1 stop11h 15mAmerican Airlines
Mon 1/66:30 amDCA - ONT
1 stop8h 16mAmerican Airlines
Deal found 11/20$335
This American Airlines deal was found by Cheapflights users on 11/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:20 amONT - IAD
1 stop10h 08mAmerican Airlines
Mon 1/66:21 amIAD - ONT
1 stop8h 25mAmerican Airlines
Deal found 11/21$335
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/251:05 pmONT - IAD
1 stop7h 14mDelta
Wed 1/87:20 amIAD - ONT
1 stop8h 06mDelta
Deal found 11/20$336
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/255:30 amONT - DCA
1 stop7h 30mDelta
Wed 1/83:40 pmDCA - ONT
2 stops11h 13mDelta
Deal found 11/20$341
This Delta deal was found by Cheapflights users on 11/20. 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.
Sat 12/145:10 pmONT - BWI
1 stop9h 42mDelta
Tue 12/177:08 amBWI - ONT
1 stop8h 17mDelta
Deal found 11/20$346
This Trip.com deal was found by Cheapflights users on 11/19. 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.
Thu 12/195:34 pmONT - BWI
1 stop16h 52mFrontier
Mon 12/302:16 pmBWI - ONT
1 stop12h 43mFrontier
Deal found 11/19$350
This United Airlines deal was found by Cheapflights users on 11/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/146:00 amONT - IAD
1 stop10h 29mUnited Airlines
Fri 1/38:25 amIAD - ONT
1 stop7h 15mUnited Airlines
Deal found 11/21$390
This American Airlines deal was found by Cheapflights users on 11/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1112:53 pmONT - BWI
1 stop7h 10mAmerican Airlines
Sun 1/197:00 pmBWI - ONT
1 stop7h 58mAmerican Airlines
Deal found 11/21$394
This Southwest deal was found by Cheapflights users on 11/19. 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.
Wed 12/2511:30 amONT - IAD
2 stops8h 30mSouthwest
Wed 1/811:10 amIAD - ONT
2 stops12h 35mSouthwest
Deal found 11/19$417
This eDestinos deal was found by Cheapflights users on 11/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2712:59 amONT - IAD
2 stops34h 13mFrontier
Sat 1/46:27 pmIAD - ONT
2 stops39h 42mFrontier
Deal found 11/20$418
This United Airlines deal was found by Cheapflights users on 11/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/255:05 amONT - DCA
1 stop6h 54mUnited Airlines
Tue 12/314:13 pmDCA - ONT
1 stop7h 36mUnited Airlines
Deal found 11/21$436

Find flights from Ontario to Washington, D.C. within your budget

Customize your flight search to find flights from Ontario to Washington, D.C. 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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 12/12

6:45 am-4:59 pm

1 stop7h 14m

Washington, D.C. Reagan-National

Sun 12/15

7:00 am-9:39 am

1 stop29h 39m

$178

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 3/1

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Sat 3/8

12:59 pm-11:44 pm

1 stop13h 45m

$327

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 3/1

6:00 am-5:56 pm

1 stop8h 56m

Baltimore/Washington

Sat 3/8

1:03 pm-11:44 pm

1 stop13h 41m

$333

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 12/17

6:20 am-8:35 pm

1 stop11h 15m

Washington, D.C. Reagan-National

Mon 1/6

6:30 am-11:46 am

1 stop8h 16m

$335

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 12/17

6:20 am-7:28 pm

1 stop10h 08m

Washington, D.C. Dulles Intl

Mon 1/6

6:21 am-11:46 am

1 stop8h 25m

$335

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 12/25

5:30 am-4:00 pm

1 stop7h 30m

Washington, D.C. Reagan-National

Wed 1/8

5:10 pm-11:53 pm

1 stop9h 43m

$336

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 1/14

1:21 pm-11:36 pm

1 stop7h 15m

Washington, D.C. Dulles Intl

Wed 1/15

5:57 pm-10:52 pm

1 stop7h 55m

$336

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 12/14

5:10 pm-5:52 am

1 stop9h 42m

Baltimore/Washington

Tue 12/17

7:08 am-12:25 pm

1 stop8h 17m

$346

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 1/2

5:34 pm-1:26 pm

1 stop16h 52m

Baltimore/Washington

Mon 1/6

2:16 pm-11:59 pm

1 stop12h 43m

$348

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 1/11

10:00 am-12:18 am

2 stops11h 18m

Baltimore/Washington

Tue 1/28

1:48 pm-10:16 pm

2 stops11h 28m

$356

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 37 results
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Compare providers for flights from Ontario to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Washington, D.C. in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

Travel insights for flights from Ontario to Washington, D.C.

Get recent, data-driven insights about flights from Ontario to Washington, D.C. including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Washington, D.C.. Price data was last updated on November 15, 2024.

The price you pay for your flight from Ontario to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Ontario to Washington, D.C. (average of $300). Flying from Ontario to Washington, D.C. in June is currently the most expensive (average of $376). 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 WAS?

Find hourly flight availability from Ontario to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

It’s typically best to fly out from Ontario to Washington, D.C. in the afternoon. Doing so could potentially save you 35% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Ontario to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Washington, D.C.. Price data was last updated on November 18, 2024.

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

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated November 21, 2024.
Get a feel of what it's like to fly with United Airlines, American Airlines and Delta from Ontario to Washington, D.C. by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,758 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington, D.C.. 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.?

    If you book a flight to Washington, D.C. from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Ontario to Washington, D.C. per day from 6 different airlines.

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

    Cheapflights users have booked flights from Ontario to Washington, D.C. round-trip from $178. Other airlines that can offer you cheap pricing are American Airlines, from $335, and Delta, from $336. Users have found that Frontier is 49% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Washington, D.C. one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $88. Users have also found prices from $142 and $168 on American Airlines and Delta, respectively.

  • What are the most popular routes from Ontario to Washington, D.C.?

    When deciding which route to take from Ontario to Washington, D.C. consider Ontario - Washington, D.C. Reagan-National, Ontario - Baltimore/Washington or Ontario - Washington, D.C. Dulles Intl as they are the most popular.

  • Can I find deals for flights from Ontario to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Ontario to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Washington, D.C.?

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

  • Can I find deals for business class flights from Ontario to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Ontario to Washington, D.C. 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.?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Washington, D.C. (average of $300). Flying from Ontario to Washington, D.C. in June is currently the most expensive (average of $376). 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.

See more FAQs

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Alternative routes for Ontario to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Washington, D.C.

Discover the top 6 airlines that operate flights from Ontario to Washington, D.C.. 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$295FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$151Average$234FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$192Average$503FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$254Average$502FlexibilityNo cancel feeOn-time69%
DeltaCheapest$262Average$438FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$286Average$459FlexibilityNo cancel feeOn-time63%
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