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District of Columbia

$65+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
פב​​​​​​​' 27 — מרץ 61
ה' 2/27
ה' 3/6
1 adult, Economy
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Cheap flight deals from Ontario to District of Columbia

Keep the following information in mind while searching for Ontario to District of Columbia flight deals. Data was last updated פברואר 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$150
(Frontier)

One-way from

$65
(Cheapflightsfares)

Popular in

December

Cheapest in

August

Average price

$331
Provider with most accurate pricing for Los Angeles-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Washington, D.C. (WAS) flights.
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From Ontario to District of Columbia
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One-way flight from Ontario to District of Columbia
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Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 פברואר 22, 2025.

This Frontier deal was found by Cheapflights users on 2/22. 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.
ג' 3/1112:59 amONT - DCA
1 stop8h 04mFrontier
ב' 3/176:00 pmDCA - ONT
1 stop8h 59mFrontier
Deal found 2/22$150
This Frontier deal was found by Cheapflights users on 2/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ה' 5/16:35 pmONT - IAD
1 stop8h 56mFrontier
ש' 5/317:32 amIAD - ONT
1 stop10h 16mFrontier
Deal found 2/21$189
This Delta deal was found by Cheapflights users on 2/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ג' 3/255:30 pmONT - IAD
1 stop9h 49mDelta
ד' 4/27:43 amIAD - ONT
1 stop11h 59mDelta
Deal found 2/21$263
This Alaska Airlines deal was found by Cheapflights users on 2/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ג' 4/86:00 amONT - IAD
1 stop20h 34mAlaska Airlines
ד' 4/236:30 amIAD - ONT
1 stop12h 02mAlaska Airlines
Deal found 2/21$294
This Southwest deal was found by Cheapflights users on 2/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ב' 3/102:50 pmONT - IAD
1 stop6h 55mSouthwest
ד' 3/195:30 pmIAD - ONT
1 stop8h 25mSouthwest
Deal found 2/21$327
This Delta deal was found by Cheapflights users on 2/22. 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.
ד' 3/127:00 amONT - DCA
2 stops9h 19mDelta
ב' 3/176:00 amDCA - ONT
1 stop8h 36mDelta
Deal found 2/22$332
This American Airlines deal was found by Cheapflights users on 2/21. 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.
ב' 3/109:32 amONT - IAD
2 stops11h 26mAmerican Airlines
ד' 3/196:27 amIAD - ONT
2 stops10h 33mAmerican Airlines
Deal found 2/21$337
This Hawaiian Airlines deal was found by Cheapflights users on 2/20. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ד' 4/2311:46 amONT - IAD
1 stop9h 12mHawaiian Airlines
ד' 4/306:30 amIAD - ONT
1 stop12h 02mHawaiian Airlines
Deal found 2/20$349
This American Airlines deal was found by Cheapflights users on 2/20. 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.
ג' 3/1811:59 pmONT - DCA
1 stop7h 58mAmerican Airlines
ה' 3/205:00 amDCA - ONT
1 stop8h 05mAmerican Airlines
Deal found 2/20$362
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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.
ג' 3/185:44 pmONT - DCA
1 stop21h 14mAlaska Airlines
ה' 3/208:00 amDCA - ONT
2 stops18h 59mAlaska Airlines
Deal found 2/20$365
This United Airlines deal was found by Cheapflights users on 2/21. 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.
ב' 4/146:10 amONT - DCA
1 stop6h 51mUnited Airlines
ד' 4/238:30 amDCA - ONT
2 stops14h 51mUnited Airlines
Deal found 2/21$373
This Southwest deal was found by Cheapflights users on 2/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
א' 4/276:00 amONT - DCA
1 stop9h 00mSouthwest
ה' 5/12:50 pmDCA - ONT
2 stops9h 45mSouthwest
Deal found 2/21$398

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 פברואר 22, 2025.

Fly from

Ontario

Fly to

District of Columbia

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

ג' 3/11

12:59 am-12:03 pm

1 stop8h 04m

Washington, D.C. Reagan-National

ב' 3/17

6:00 pm-11:59 pm

1 stop8h 59m

$150

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

ה' 5/1

6:35 pm-6:31 am

1 stop8h 56m

Washington, D.C. Dulles Intl

ש' 5/31

7:32 am-2:48 pm

1 stop10h 16m

$189

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

ג' 3/25

5:30 pm-6:19 am

1 stop9h 49m

Washington, D.C. Dulles Intl

ד' 4/2

7:43 am-4:42 pm

1 stop11h 59m

$263

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

ג' 4/8

6:00 am-5:34 am

1 stop20h 34m

Washington, D.C. Dulles Intl

ד' 4/23

6:30 am-3:32 pm

1 stop12h 02m

$294

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

ד' 3/12

10:57 am-10:59 pm

1 stop9h 02m

Washington, D.C. Reagan-National

ב' 3/17

6:58 pm-11:54 pm

1 stop7h 56m

$327

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

ב' 3/10

2:50 pm-12:45 am

1 stop6h 55m

Washington, D.C. Dulles Intl

ד' 3/19

5:30 pm-10:55 pm

1 stop8h 25m

$327

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

ד' 3/12

7:00 am-7:19 pm

2 stops9h 19m

Washington, D.C. Reagan-National

ב' 3/17

6:00 am-11:36 am

1 stop8h 36m

$332

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

ב' 3/10

9:32 am-11:58 pm

2 stops11h 26m

Washington, D.C. Dulles Intl

ד' 3/19

6:27 am-2:00 pm

2 stops10h 33m

$337

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

ד' 4/23

11:46 am-11:58 pm

1 stop9h 12m

Washington, D.C. Dulles Intl

ד' 4/30

6:30 am-3:32 pm

1 stop12h 02m

$349

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

ג' 3/18

5:44 pm-5:58 pm

1 stop21h 14m

Washington, D.C. Reagan-National

ה' 3/20

8:00 am-11:59 pm

2 stops18h 59m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 26 results
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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, August is the cheapest month in which you can book a flight from Ontario to District of Columbia (average of $309). Flying from Ontario to District of Columbia in June is currently the most expensive (average of $389). 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 פברואר 22, 2025.

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 פברואר 22, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines 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
4,395 reviews

Entertainment

7.6

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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
4,395 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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
9,700 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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
8,203 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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.

Hawaiian Airlines
7.9
Good
2,314 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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
8,754 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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 $65. Users have also found prices from $132 and $137 on Alaska Airlines and Delta, 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, August is the cheapest month in which you can book a flight from Ontario to District of Columbia (average of $309). Flying from Ontario to District of Columbia in June is currently the most expensive (average of $389). 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 District of Columbia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Ontario to District of Columbia

Discover the top 7 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 פברואר 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$251FlexibilityNo cancel feeOn-time65%
FrontierCheapest$148Average$292FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$168Average$288FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$256Average$501FlexibilityNo cancel feeOn-time69%
DeltaCheapest$267Average$428FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$286Average$519FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$301Average$504FlexibilityNo cancel feeOn-time63%
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