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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
Mar 6 — Mar 131
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Cheap 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 February 4, 2026.

This Frontier deal was found by Cheapflights users on 2/3. 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 2/248:35 am
ONT
-
DCA
1 stop10h 24m
Frontier
Wed 2/252:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Deal found 2/3$148
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com 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 2/2$150
This Mytrip deal was found by Cheapflights users on 2/2. 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.
Sat 2/286:00 am
ONT
-
DCA
1 stop7h 59m
Frontier
Wed 3/42:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Deal found 2/2$158
This Gotogate deal was found by Cheapflights users on 2/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/262:08 pm
ONT
-
DCA
1 stop23h 51m
Frontier
Wed 3/42:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Deal found 2/2$162
This Frontier deal was found by Cheapflights users on 2/1. 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
Tue 3/102:00 pm
DCA
-
ONT
1 stop12h 59m
Frontier
Deal found 2/1$174
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:40 am
ONT
-
DCA
1 stop25h 35m
Frontier
Fri 3/62:00 pm
DCA
-
ONT
1 stop12h 59m
Frontier
Deal found 2/2$184
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 4/293:26 pm
ONT
-
IAD
1 stop11h 24m
Alaska Airlines
Tue 5/57:10 am
IAD
-
ONT
1 stop10h 22m
Alaska Airlines
Deal found 2/3$257
This Delta deal was found by Cheapflights users on 2/3. 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 3/310:20 pm
ONT
-
IAD
2 stops15h 08m
Delta
Tue 3/106:01 am
IAD
-
ONT
1 stop8h 46m
Delta
Deal found 2/3$262
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 5/510:39 am
ONT
-
IAD
1 stop10h 30m
Alaska Airlines
Wed 5/67:10 am
IAD
-
ONT
1 stop10h 20m
Alaska Airlines
Deal found 2/4$277
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:15 am
ONT
-
IAD
1 stop9h 04m
Multiple Airlines
Tue 5/57:10 am
IAD
-
ONT
1 stop10h 22m
Multiple Airlines
Deal found 2/2$285
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 2/2610:20 pm
ONT
-
IAD
1 stop7h 53m
Delta
Tue 3/37:30 am
IAD
-
ONT
1 stop9h 24m
Delta
Deal found 2/4$288
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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.
Sat 5/210:39 am
ONT
-
IAD
1 stop10h 30m
Alaska Airlines
Wed 5/67:10 am
IAD
-
ONT
1 stop10h 20m
Alaska Airlines
Deal found 2/2$297

Find 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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$148
(Frontier)

One-way from

$65
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$322
Provider with most accurate pricing for Los Angeles-Washington, D.C. (WAS) flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Washington, D.C. (WAS) flights.
From Ontario to District of Columbia
One-way flight from Ontario to District of Columbia
Highest demand for flights based on searches. 14% potential increase in price ($59 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 February 4, 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

Thu 2/26

2:08 pm-4:59 pm

1 stop23h 51m

Washington, D.C. Reagan-National

Sat 2/28

2:00 pm-7:59 am

1 stop20h 59m

$158

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 2/24

8:35 am-9:59 pm

1 stop10h 24m

Washington, D.C. Reagan-National

Mon 3/2

6:00 pm-11:59 pm

1 stop8h 59m

$158

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 3/18

6:15 am-9:59 pm

1 stop12h 44m

Washington, D.C. Reagan-National

Mon 3/23

6:00 pm-11:59 pm

1 stop8h 59m

$219

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 3/5

2:08 pm-1:02 pm

1 stop19h 54m

Washington, D.C. Reagan-National

Mon 3/9

8:00 am-11:59 pm

1 stop18h 59m

$229

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 2/21

6:00 am-4:59 pm

1 stop7h 59m

Washington, D.C. Reagan-National

Sun 3/1

6:00 pm-11:59 pm

1 stop8h 59m

$235

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 3/9

9:40 pm-1:02 pm

2 stops12h 22m

Washington, D.C. Reagan-National

Thu 3/12

6:00 pm-11:59 pm

1 stop8h 59m

$249

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 3/3

10:20 pm-1:24 pm

2 stops12h 04m

Washington, D.C. Reagan-National

Tue 3/10

6:00 am-11:47 am

1 stop8h 47m

$262

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 3/3

10:20 pm-4:28 pm

2 stops15h 08m

Washington, D.C. Dulles Intl

Tue 3/10

6:01 am-11:47 am

1 stop8h 46m

$262

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 2/27

6:00 am-4:59 pm

1 stop7h 59m

Washington, D.C. Reagan-National

Sun 3/1

6:00 pm-11:59 pm

1 stop8h 59m

$270

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 2/17

8:35 am-1:15 pm

1 stop25h 40m

Washington, D.C. Reagan-National

Fri 2/20

6:00 pm-1:11 pm

2 stops22h 11m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 46 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 February 4, 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.

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Overall

8.0

Food

7.0

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.

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Overall

8.0

Food

7.0

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.

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Overall

8.0

Food

7.0

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.

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Overall

8.0

Food

7.0

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.

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Overall

8.0

Food

7.0

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.

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Overall

8.0

Food

7.0

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 15h 08m. Frontier provides one of the quickest options available for as low as $262. 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.

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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$72Average$224FlexibilityNo cancel feeOn-time65%
FrontierCheapest$136Average$267FlexibilityNo cancel feeOn-time62%
DeltaCheapest$183Average$424FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$226Average$454FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$258Average$455FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$278Average$479FlexibilityNo cancel feeOn-time71%

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