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District of Columbia

$66+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
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 January 12, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$148
(Frontier)

One-way from

$66
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$351
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. 13% potential increase in price ($56 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 January 2026
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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 January 12, 2026.

This Frontier deal was found by Cheapflights users on 1/11. 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 2/37:15 am
ONT
-
DCA
1 stop11h 44m
Frontier
Tue 2/102:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Deal found 1/11$148
This Frontier deal was found by Cheapflights users on 1/12. 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.
Wed 3/48:40 am
ONT
-
DCA
1 stop10h 19m
Frontier
Sat 3/76:00 pm
DCA
-
ONT
1 stop8h 59m
Frontier
Deal found 1/12$149
This Frontier deal was found by Cheapflights users on 1/12. 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.
Sat 3/76:15 am
ONT
-
DCA
1 stop12h 44m
Frontier
Tue 3/242:00 pm
DCA
-
ONT
1 stop12h 59m
Frontier
Deal found 1/12$150
This CheapOair deal was found by Cheapflights users on 1/9. 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.
Sat 3/286:15 am
ONT
-
DCA
1 stop12h 44m
Frontier
Wed 4/18:00 am
DCA
-
ONT
1 stop18h 59m
Frontier
Deal found 1/9$151
This Booking.com deal was found by Cheapflights users on 1/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:10 am
ONT
-
DCA
1 stop7h 49m
Frontier
Wed 2/188:00 am
DCA
-
ONT
1 stop28h 34m
Frontier
Deal found 1/12$155
This Frontier deal was found by Cheapflights users on 1/12. 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 2/37:15 am
ONT
-
DCA
1 stop11h 44m
Frontier
Thu 2/196:00 pm
DCA
-
ONT
1 stop8h 59m
Frontier
Deal found 1/12$159
This Frontier deal was found by Cheapflights users on 1/11. 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 3/38:40 am
ONT
-
DCA
1 stop10h 19m
Frontier
Sat 3/76:00 pm
DCA
-
ONT
1 stop8h 59m
Frontier
Deal found 1/11$160
This Booking.com deal was found by Cheapflights users on 1/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:05 am
ONT
-
DCA
1 stop7h 54m
Frontier
Sat 2/282:00 pm
DCA
-
ONT
1 stop20h 59m
Frontier
Deal found 1/11$166
This Mytrip deal was found by Cheapflights users on 1/12. 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.
Wed 1/287:15 am
ONT
-
DCA
1 stop26h 47m
Frontier
Tue 2/36:00 pm
DCA
-
ONT
1 stop24h 07m
Frontier
Deal found 1/12$168
This Frontier deal was found by Cheapflights users on 1/12. 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.
Thu 2/196:05 am
ONT
-
DCA
1 stop12h 54m
Frontier
Tue 2/242:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Deal found 1/12$170
This CheapOair deal was found by Cheapflights users on 1/10. 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.
Mon 1/266:20 am
ONT
-
DCA
1 stop12h 39m
Frontier
Thu 1/298:00 am
DCA
-
ONT
1 stop19h 20m
Frontier
Deal found 1/10$171
This Frontier deal was found by Cheapflights users on 1/11. 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.
Thu 1/226:20 am
ONT
-
DCA
1 stop12h 39m
Frontier
Wed 1/288:59 am
DCA
-
ONT
1 stop9h 08m
Frontier
Deal found 1/11$176

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 January 12, 2026.
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

Wed 2/11

8:10 am-6:59 pm

1 stop7h 49m

Washington, D.C. Reagan-National

Sat 2/14

6:00 pm-11:59 pm

1 stop8h 59m

$168

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 2/7

7:15 am-9:59 pm

1 stop11h 44m

Washington, D.C. Reagan-National

Sat 2/21

2:00 pm-11:59 pm

1 stop12h 59m

$179

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sun 3/1

2:08 pm-1:00 pm

1 stop19h 52m

Washington, D.C. Reagan-National

Tue 3/3

2:00 pm-9:34 pm

1 stop10h 34m

$186

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 2/25

8:40 am-6:59 pm

1 stop7h 19m

Washington, D.C. Reagan-National

Fri 2/27

6:00 pm-11:59 pm

1 stop8h 59m

$191

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 2/9

6:20 am-9:59 pm

1 stop12h 39m

Washington, D.C. Reagan-National

Fri 2/20

2:00 pm-11:59 pm

1 stop12h 59m

$210

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 3/19

6:15 am-9:59 pm

1 stop12h 44m

Washington, D.C. Reagan-National

Thu 3/26

6:00 pm-11:59 pm

1 stop8h 59m

$250

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 3/17

6:15 am-9:59 pm

1 stop12h 44m

Washington, D.C. Reagan-National

Thu 4/2

6:00 pm-4:58 pm

2 stops25h 58m

$292

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 3/20

6:15 am-9:59 pm

1 stop12h 44m

Washington, D.C. Reagan-National

Mon 3/23

2:00 pm-11:59 pm

1 stop12h 59m

$300

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 2/11

1:11 pm-11:48 pm

1 stop7h 37m

Washington, D.C. Dulles Intl

Wed 2/18

7:05 am-12:07 pm

1 stop8h 02m

$319

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 2/10

1:11 pm-11:48 pm

1 stop7h 37m

Washington, D.C. Dulles Intl

Tue 2/17

7:05 am-12:07 pm

1 stop8h 02m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

Showing 1-10 of 44 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 $93). Flying from Ontario to District of Columbia in December is currently the most expensive (average of $179). 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.

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 January 12, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to District of Columbia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,256 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,039 reviews
Southwest
8.0
Very good
4,256 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,149 reviews
Southwest
8.0
Very good
4,256 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,114 reviews
Southwest
8.0
Very good
4,256 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,256 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 long is the flight from Ontario to District of Columbia?

    A quick flight from Ontario to District of Columbia can take about 7h 37m. Frontier provides one of the quickest options available for as low as $319. The distance between Ontario and District of Columbia is about 2236 mi. This flight may include one or multiple stops.

  • 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 $71. Users have also found prices from $113 and $122 on United Airlines and Southwest, 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 $93). Flying from Ontario to District of Columbia in December is currently the most expensive (average of $179). 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 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 January 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$98Average$224FlexibilityNo cancel feeOn-time65%
FrontierCheapest$147Average$274FlexibilityNo cancel feeOn-time62%
DeltaCheapest$208Average$381FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$226Average$450FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$258Average$458FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$278Average$470FlexibilityNo cancel feeOn-time71%

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