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

$64+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
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 December 18, 2024.

Round-trip from

$178
(Booking.com)

One-way from

$64
(Cheapflightsfares)
From Ontario to District of Columbia
Search Deals
One-way flight from Ontario to District of Columbia
Search Deals

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 December 18, 2024.

This Frontier deal was found by Cheapflights users on 12/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2412:59 amONT - DCA
1 stop8h 09mFrontier
Mon 1/131:01 pmDCA - ONT
1 stop7h 34mFrontier
Deal found 12/17$228
This Delta deal was found by Cheapflights users on 12/17. 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.
Tue 12/241:05 pmONT - IAD
1 stop7h 14mDelta
Mon 1/135:57 pmIAD - ONT
1 stop7h 55mDelta
Deal found 12/17$366
This Delta deal was found by Cheapflights users on 12/17. 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
Fri 1/36:50 pmDCA - ONT
1 stop7h 51mDelta
Deal found 12/17$392
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/2510:02 amONT - IAD
2 stops9h 37mAmerican Airlines
Wed 1/16:21 amIAD - ONT
1 stop10h 37mAmerican Airlines
Deal found 12/17$423
This United Airlines deal was found by Cheapflights users on 12/17. 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
Thu 1/26:30 amIAD - ONT
1 stop9h 10mUnited Airlines
Deal found 12/17$492
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/247:15 amONT - DCA
1 stop9h 24mAmerican Airlines
Sat 12/281:12 pmDCA - ONT
1 stop10h 45mAmerican Airlines
Deal found 12/17$505
This Southwest deal was found by Cheapflights users on 12/17. 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 12/259:25 amONT - IAD
2 stops10h 35mSouthwest
Wed 1/17:25 amIAD - ONT
2 stops11h 05mSouthwest
Deal found 12/17$543
This United Airlines deal was found by Cheapflights users on 12/17. 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
Wed 1/14:13 pmDCA - ONT
1 stop7h 36mUnited Airlines
Deal found 12/17$577
This Southwest deal was found by Cheapflights users on 12/17. 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 12/271:05 pmONT - DCA
1 stop6h 50mSouthwest
Thu 1/23:55 pmDCA - ONT
2 stops10h 40mSouthwest
Deal found 12/17$606
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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.
Tue 12/316:00 amONT - IAD
1 stop20h 40mAlaska Airlines
Wed 2/197:00 amIAD - ONT
1 stop17h 27mAlaska Airlines
Deal found 12/17$922

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 2,558,603 searches. Data last updated December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 2/20

12:59 am-12:03 pm

1 stop8h 04m

Washington, D.C. Reagan-National

Mon 2/24

6:00 pm-11:59 pm

1 stop8h 59m

$178

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 1/14

1:21 pm-11:36 pm

1 stop7h 15m

Washington, D.C. Dulles Intl

Sat 1/18

7:17 am-11:50 am

1 stop7h 33m

$341

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 1/25

6:00 am-5:59 pm

2 stops8h 59m

Washington, D.C. Reagan-National

Tue 1/28

2:59 pm-10:45 pm

1 stop10h 46m

$346

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 1/15

6:10 am-10:41 pm

2 stops13h 31m

Washington, D.C. Dulles Intl

Sat 1/18

1:52 pm-10:45 pm

2 stops11h 53m

$351

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/1

10:47 am-9:13 pm

1 stop7h 26m

Washington, D.C. Dulles Intl

Sat 2/15

12:35 pm-8:40 pm

1 stop11h 05m

$352

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/1

6:00 am-5:57 pm

1 stop8h 57m

Washington, D.C. Dulles Intl

Tue 2/4

6:57 pm-10:38 am

1 stop18h 41m

$357

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 3/26

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Tue 4/1

7:00 am-2:27 pm

1 stop10h 27m

$391

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Mon 1/27

10:55 am-11:05 pm

1 stop9h 10m

Washington, D.C. Dulles Intl

Mon 2/3

11:10 am-9:45 pm

2 stops13h 35m

$401

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 1/24

6:00 am-6:57 pm

2 stops9h 57m

Washington, D.C. Reagan-National

Mon 1/27

5:10 pm-11:53 pm

1 stop9h 43m

$401

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 3/10

5:44 pm-5:40 pm

1 stop20h 56m

Washington, D.C. Reagan-National

Sat 3/15

5:25 pm-11:02 am

1 stop20h 37m

$428

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 24 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, November is the cheapest month in which you can book a flight from Ontario to District of Columbia (average of $299). Flying from Ontario to District of Columbia in June is currently the most expensive (average of $377). 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 December 18, 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 December 18, 2024.
Get a feel of what it's like to fly with Alaska Airlines, Delta and Southwest 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
4,848 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,279 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 $64. Users have also found prices from $168 and $178 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, November is the cheapest month in which you can book a flight from Ontario to District of Columbia (average of $299). Flying from Ontario to District of Columbia in June is currently the most expensive (average of $377). 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
Los Angeles to Honolulu flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Las Vegas flights
Los Angeles to LaGuardia flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Miami flights
Los Angeles to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to Orlando flights
Los Angeles to O'Hare Intl flights
Santa Ana to Las Vegas flights
San Francisco to Newark flights
Los Angeles to San Francisco flights
Los Angeles to Hobby flights
San Francisco to Honolulu flights
San Francisco to Seattle flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
Los Angeles to Fort Lauderdale flights
San Francisco to Dallas/Fort Worth flights
Oakland to Las Vegas flights
Los Angeles to Reagan-National flights
Ontario to Dallas/Fort Worth flights
Los Angeles to Boston flights
San Francisco to Miami flights
Santa Ana to Newark flights
Los Angeles to George Bush Intcntl flights
Ontario to Seattle flights
Los Angeles to Baltimore flights
Los Angeles to Atlanta flights
San Francisco to LaGuardia flights
Los Angeles to New Orleans flights
Burbank to Newark flights
San Jose to Los Angeles flights
Los Angeles to San Jose flights
Los Angeles to Portland flights
Santa Ana to Seattle flights
Los Angeles to Salt Lake City flights
Los Angeles to Dulles Intl flights
Oakland to Los Angeles flights
San Diego to John F Kennedy Intl flights
Burbank to LaGuardia flights
Oakland to Santa Ana flights
Los Angeles to Sky Harbor Intl flights
San Francisco to Sky Harbor Intl flights
Los Angeles to Denver flights
Santa Ana to LaGuardia 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 2,558,603 searches. Data last updated December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$294FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$151Average$250FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$255Average$518FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$256Average$505FlexibilityNo cancel feeOn-time69%
DeltaCheapest$262Average$434FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$296Average$491FlexibilityNo 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.