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District of Columbia

$108+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$252
(SmartFares)

One-way from

$108
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$337
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. 10% potential increase in price ($43 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 July 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 July 31, 2025.

This SmartFares deal was found by Cheapflights users on 7/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2212:59 amONT - DCA
1 stop8h 12mFrontier
Sat 8/306:00 pmDCA - ONT
1 stop8h 50mFrontier
Deal found 7/29$252
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/55:15 pmONT - IAD
1 stop10h 19mFrontier
Tue 8/196:14 amIAD - ONT
1 stop13h 04mFrontier
Deal found 7/29$257
This Delta deal was found by Cheapflights users on 7/30. 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 8/3011:45 amONT - IAD
1 stop8h 36mDelta
Sat 9/612:39 pmIAD - ONT
1 stop9h 32mDelta
Deal found 7/30$276
This Delta deal was found by Cheapflights users on 7/29. 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 8/237:05 amONT - DCA
1 stop7h 15mDelta
Sat 8/306:00 amDCA - ONT
1 stop7h 20mDelta
Deal found 7/29$277
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Thu 8/2112:22 pmONT - IAD
2 stops8h 37mAmerican Airlines
Mon 8/2511:51 amIAD - ONT
1 stop9h 33mAmerican Airlines
Deal found 7/31$284
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Thu 8/2112:22 pmONT - DCA
2 stops8h 37mAmerican Airlines
Mon 8/253:25 pmDCA - ONT
2 stops9h 14mAmerican Airlines
Deal found 7/31$289
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 10/296:00 amONT - DCA
1 stop12h 59mAlaska Airlines
Mon 11/35:53 pmDCA - ONT
1 stop9h 03mAlaska Airlines
Deal found 7/29$298
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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 8/2711:39 amONT - IAD
1 stop9h 41mAlaska Airlines
Wed 9/37:00 amIAD - ONT
1 stop10h 12mAlaska Airlines
Deal found 7/31$298
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Mon 8/256:04 amONT - DCA
1 stop9h 37mUnited Airlines
Mon 9/17:00 amDCA - ONT
1 stop8h 13mUnited Airlines
Deal found 7/28$319
This Hawaiian Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 9/2011:39 amONT - IAD
1 stop9h 44mHawaiian Airlines
Tue 9/237:00 amIAD - ONT
1 stop10h 12mHawaiian Airlines
Deal found 7/31$340
This Southwest deal was found by Cheapflights users on 7/29. 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.
Sun 9/710:10 amONT - DCA
1 stop9h 45mSouthwest
Sat 9/206:00 amDCA - ONT
2 stops9h 30mSouthwest
Deal found 7/29$343
This Southwest deal was found by Cheapflights users on 7/30. 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 9/36:20 amONT - IAD
1 stop7h 55mSouthwest
Mon 9/87:35 amIAD - ONT
2 stops8h 05mSouthwest
Deal found 7/30$343

Cheapflights Fare Finder

 
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 July 31, 2025.
Use the filters below to find and compare flights from Ontario to District of Columbia that are best for you.

Fly from

Ontario

Fly to

District of Columbia

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 8/22

12:59 am-12:11 pm

1 stop8h 12m

Washington, D.C. Reagan-National

Sat 8/30

6:00 pm-11:50 pm

1 stop8h 50m

$252

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 8/12

5:15 pm-6:34 am

1 stop10h 19m

Washington, D.C. Dulles Intl

Sat 8/16

12:27 pm-7:14 pm

1 stop9h 47m

$258

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 8/30

11:45 am-11:21 pm

1 stop8h 36m

Washington, D.C. Dulles Intl

Sat 9/6

12:39 pm-7:11 pm

1 stop9h 32m

$276

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 8/23

7:05 am-5:20 pm

1 stop7h 15m

Washington, D.C. Reagan-National

Sat 8/30

6:00 am-10:20 am

1 stop7h 20m

$277

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 8/21

12:22 pm-11:59 pm

2 stops8h 37m

Washington, D.C. Dulles Intl

Mon 8/25

11:51 am-6:24 pm

1 stop9h 33m

$284

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 8/21

12:22 pm-11:59 pm

2 stops8h 37m

Washington, D.C. Reagan-National

Mon 8/25

3:25 pm-9:39 pm

2 stops9h 14m

$289

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 10/29

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Mon 11/3

5:53 pm-11:56 pm

1 stop9h 03m

$298

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 8/27

11:39 am-12:20 am

1 stop9h 41m

Washington, D.C. Dulles Intl

Wed 9/3

7:00 am-2:12 pm

1 stop10h 12m

$298

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 8/25

6:04 am-6:41 pm

1 stop9h 37m

Washington, D.C. Reagan-National

Mon 9/1

7:00 am-12:13 pm

1 stop8h 13m

$319

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 9/20

11:39 am-12:23 am

1 stop9h 44m

Washington, D.C. Dulles Intl

Tue 9/23

7:00 am-2:12 pm

1 stop10h 12m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 27 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to District of Columbia

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 $241). Flying from Ontario to District of Columbia in March is currently the most expensive (average of $290). 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 July 31, 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.

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 July 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to District of Columbia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • How popular is this Ontario to District of Columbia flight route?

    The Ontario to District of Columbia flight path was viewed by 4 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 $108. Users have also found prices from $136 and $140 on Hawaiian Airlines and American Airlines, respectively.

  • What are the cheapest flights from Ontario to District of Columbia?

    Looking at all options, your cheapest flight can be booked for $102. While the most popular route (Ontario - Washington, D.C. Dulles Intl) can be booked for $258 on average our data indicates $353 when flying from Ontario to District of Columbia.

  • 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 $241). Flying from Ontario to District of Columbia in March is currently the most expensive (average of $290). 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

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$98Average$212FlexibilityNo cancel feeOn-time65%
FrontierCheapest$147Average$271FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$258Average$465FlexibilityNo cancel feeOn-time63%
DeltaCheapest$286Average$417FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$286Average$491FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$298Average$467FlexibilityNo cancel feeOn-time69%

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