HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
District of Columbia

$145+ Cheap flights from Ontario (ONT) to District of Columbia

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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to District of Columbia with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to District of Columbia

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to District of Columbia (USDC). 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 20, 2024.

Find flight deals from Ontario to District of Columbia

Cheapest flights from Ontario to District of Columbia
Explore the most affordable flight options available from Ontario to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2512:59 amONT - DCA
1 stop8h 09mFrontier
Sun 1/56:00 pmDCA - ONT
1 stop8h 59mFrontier
Deal found 11/19$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 11/20. 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 - IAD
1 stop10h 08mAmerican Airlines
Mon 1/65:15 pmIAD - ONT
1 stop9h 42mAmerican Airlines
Deal found 11/20$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 12/255:30 amONT - DCA
1 stop7h 30mDelta
Wed 1/85:10 pmDCA - ONT
1 stop9h 43mDelta
Deal found 11/20$336
This Delta deal was found by Cheapflights users on 11/18. 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.
Mon 11/251:18 pmONT - IAD
1 stop7h 31mDelta
Tue 11/267:00 amIAD - ONT
1 stop8h 11mDelta
Deal found 11/18$336
This United Airlines deal was found by Cheapflights users on 11/18. 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 - IAD
1 stop7h 34mUnited Airlines
Tue 12/316:35 amIAD - ONT
1 stop9h 05mUnited Airlines
Deal found 11/18$403
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/215:45 amONT - DCA
1 stop8h 14mMultiple Airlines
Thu 11/288:00 amDCA - ONT
1 stop12h 29mMultiple Airlines
Deal found 11/19$407
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.
Fri 12/1312:50 pmONT - DCA
1 stop7h 00mSouthwest
Sun 12/156:00 amDCA - ONT
2 stops9h 45mSouthwest
Deal found 11/19$421
This United Airlines 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 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 11/19$436
This Southwest deal was found by Cheapflights users on 11/18. 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.
Fri 12/69:05 amONT - IAD
2 stops10h 55mSouthwest
Mon 12/93:45 pmIAD - ONT
1 stop8h 00mSouthwest
Deal found 11/18$442
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/111:53 pmONT - IAD
2 stops23h 39mAlaska Airlines
Sun 1/196:57 pmIAD - ONT
2 stops18h 37mAlaska Airlines
Deal found 11/20$467
This eDestinos 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 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
Fri 1/39:55 pmIAD - ONT
2 stops22h 58mFrontier
Deal found 11/19$514

Find flights from Ontario to District of Columbia within your budget

Customize your flight search to find flights from Ontario to District of Columbia 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 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 12/25

12:59 am-12:08 pm

1 stop8h 09m

Washington, D.C. Reagan-National

Sun 1/5

6:00 pm-11:59 pm

1 stop8h 59m

$178

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 2/12

6:00 am-4:14 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Tue 2/18

6:30 am-9:02 pm

1 stop17h 32m

$310

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

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 - 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

Sat 2/1

5:10 am-3:49 pm

1 stop7h 39m

Washington, D.C. Dulles Intl

Wed 2/5

12:35 pm-6:04 pm

1 stop8h 29m

$336

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 1/11

1:21 pm-11:36 pm

1 stop7h 15m

Washington, D.C. Dulles Intl

Sat 1/18

5:57 pm-10:52 pm

1 stop7h 55m

$338

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/1

5:40 am-6:45 pm

1 stop10h 05m

Washington, D.C. Dulles Intl

Wed 2/5

11:10 am-8:45 pm

2 stops12h 35m

$351

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 2/5

6:00 am-5:57 pm

1 stop8h 57m

Washington, D.C. Dulles Intl

Tue 2/25

7:00 am-9:27 pm

1 stop17h 27m

$369

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Fri 12/27

12:59 am-2:12 pm

2 stops34h 13m

Washington, D.C. Dulles Intl

Sat 1/4

6:27 pm-7:09 am

2 stops39h 42m

$418

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 25 results
1
2
3

Best time to book a flight from Ontario to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia 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 District of Columbia

Get recent, data-driven insights about flights from Ontario to District of Columbia including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to District of Columbia?

Currently, September is the cheapest month in which you can book a flight from Ontario to District of Columbia (average of $300). Flying from Ontario to District of Columbia 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 DC?

Find hourly flight availability from Ontario to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to District of Columbia as you normally would.

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in District of Columbia 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 District of Columbia when rainfall is around 2.6 in.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to District of Columbia, 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 District of Columbia

Get insights into the airlines that provide service to District of Columbia. 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 District of Columbia. Reviews last updated November 20, 2024.
Get a feel of what it's like to fly with Alaska Airlines, Frontier and Delta from Ontario to District of Columbia 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
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

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
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

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
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

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
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

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
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

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
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

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 District of Columbia. 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 District of Columbia?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to District of Columbia. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • What are the cheapest airlines to fly from Ontario to District of Columbia one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $145. Users have also found prices from $168 and $173 on Delta and American Airlines, respectively.

  • Can I find deals for flights from Ontario to District of Columbia that include hotel bookings?

    Yes. In addition to deals on Ontario to District of Columbia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to District of Columbia?

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

  • Can I find deals for business class flights from Ontario to District of Columbia?

    Yes. Cheapflights offers flight deals from Ontario to District of Columbia 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 District of Columbia?

    Currently, September is the cheapest month in which you can book a flight from Ontario to District of Columbia (average of $300). Flying from Ontario to District of Columbia 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to District of Columbia

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Honolulu flights
Los Angeles to Seattle flights
Los Angeles to LaGuardia flights
Los Angeles to Miami flights
Los Angeles to San Francisco flights
San Francisco to Newark flights
Los Angeles to O'Hare Intl flights
Los Angeles to Orlando flights
San Francisco to Los Angeles flights
San Francisco to Seattle flights
San Francisco to Las Vegas flights
Los Angeles to Las Vegas flights
Los Angeles to Fort Lauderdale flights
San Francisco to LaGuardia flights
Santa Ana to Las Vegas flights
Santa Ana to Newark flights
Los Angeles to Boston flights
San Francisco to Honolulu flights
Burbank to Las Vegas flights
Ontario to Dallas/Fort Worth flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to San Jose flights
Los Angeles to Hobby flights
San Jose to Las Vegas flights
San Diego to John F Kennedy Intl flights
San Jose to Los Angeles flights
Los Angeles to Reagan-National flights
Los Angeles to Oakland flights
Los Angeles to Dulles Intl flights
Oakland to Los Angeles flights
Los Angeles to George Bush Intcntl flights
Los Angeles to Portland flights
San Francisco to Miami flights
Burbank to Newark flights
San Francisco to Ontario flights
Los Angeles to Atlanta flights
Oakland to Las Vegas flights
Ontario to San Francisco flights
Burbank to LaGuardia flights
Los Angeles to Baltimore flights
Ontario to Seattle flights
San Francisco to O'Hare Intl flights
Los Angeles to New Orleans flights
San Diego to Newark flights
San Francisco to Dulles Intl flights
Los Angeles to Salt Lake City flights

Top 6 airlines flying from Ontario to District of Columbia

Discover the top 6 airlines that operate flights from Ontario to District of Columbia. 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 20, 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%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines