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District of Columbia

$92+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
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 septiembre 15, 2025.

Round-trip from

$225
(Booking.com)

One-way from

$92
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$357
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 ($41 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 September 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 septiembre 15, 2025.

This Booking.com deal was found by Cheapflights users on 9/15. 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.
mié. 9/248:59 pmONT - DCA
1 stop12h 11mFrontier
sáb. 9/271:00 pmDCA - ONT
1 stop9h 54mFrontier
Deal found 9/15$225
This Booking.com deal was found by Cheapflights users on 9/15. 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.
mié. 9/248:59 pmONT - DCA
1 stop22h 00mFrontier
vie. 9/266:00 pmDCA - ONT
1 stop28h 54mFrontier
Deal found 9/15$230
This Booking.com deal was found by Cheapflights users on 9/14. 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.
jue. 9/258:59 pmONT - DCA
1 stop12h 11mFrontier
lun. 9/296:00 pmDCA - ONT
1 stop28h 54mFrontier
Deal found 9/14$231
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/246:53 amONT - DCA
1 stop7h 06mFrontier
mar. 10/286:31 pmDCA - ONT
1 stop8h 19mFrontier
Deal found 9/14$232
This Frontier deal was found by Cheapflights users on 9/15. 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.
dom. 10/2610:40 pmONT - DCA
2 stops20h 19mFrontier
mié. 10/292:00 pmDCA - ONT
1 stop12h 50mFrontier
Deal found 9/15$233
This Frontier deal was found by Cheapflights users on 9/14. 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.
mar. 9/238:59 pmONT - DCA
1 stop12h 11mFrontier
jue. 10/21:00 pmDCA - ONT
1 stop9h 54mFrontier
Deal found 9/14$234
This Booking.com deal was found by Cheapflights users on 9/15. 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.
dom. 9/217:15 pmONT - IAD
1 stop11h 02mFrontier
jue. 9/2510:17 amIAD - ONT
1 stop8h 12mFrontier
Deal found 9/15$235
This Frontier deal was found by Cheapflights users on 9/14. 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.
sáb. 9/278:59 pmONT - DCA
1 stop12h 11mFrontier
jue. 10/21:00 pmDCA - ONT
1 stop9h 54mFrontier
Deal found 9/14$236
This Frontier deal was found by Cheapflights users on 9/13. 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.
jue. 9/254:14 pmONT - IAD
1 stop14h 03mFrontier
jue. 10/27:14 pmIAD - ONT
2 stops19h 14mFrontier
Deal found 9/13$236
This Booking.com deal was found by Cheapflights users on 9/14. 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.
sáb. 9/208:59 pmONT - DCA
1 stop12h 11mFrontier
mié. 9/247:00 amDCA - ONT
1 stop15h 54mFrontier
Deal found 9/14$238
This Frontier deal was found by Cheapflights users on 9/14. 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.
mié. 9/248:59 pmONT - DCA
1 stop12h 11mFrontier
jue. 10/21:00 pmDCA - ONT
1 stop9h 54mFrontier
Deal found 9/14$239
This Booking.com deal was found by Cheapflights users on 9/15. 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.
lun. 9/228:59 pmONT - DCA
1 stop22h 00mFrontier
mié. 9/247:00 amDCA - ONT
1 stop15h 54mFrontier
Deal found 9/15$241

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 septiembre 15, 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

vie. 10/3

8:59 pm-9:59 pm

1 stop22h 00m

Washington, D.C. Reagan-National

lun. 10/6

7:00 am-8:56 pm

2 stops16h 56m

$239

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

jue. 9/18

8:59 pm-9:59 pm

1 stop22h 00m

Washington, D.C. Reagan-National

mar. 9/23

7:00 am-7:54 pm

1 stop15h 54m

$266

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

sáb. 11/8

11:36 am-9:43 pm

1 stop7h 07m

Washington, D.C. Reagan-National

sáb. 11/15

6:00 am-10:40 am

1 stop7h 40m

$277

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mié. 11/12

11:46 am-12:54 am

1 stop10h 08m

Washington, D.C. Dulles Intl

mié. 11/19

6:00 am-10:40 am

1 stop7h 40m

$277

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

vie. 2/20

10:30 pm-9:11 am

1 stop7h 41m

Washington, D.C. Dulles Intl

mar. 2/24

7:15 am-12:34 pm

1 stop8h 19m

$277

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mar. 10/14

11:48 am-12:40 am

1 stop9h 52m

Washington, D.C. Dulles Intl

mié. 10/15

7:35 am-5:10 pm

1 stop12h 35m

$277

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

lun. 10/20

6:53 am-9:59 pm

1 stop12h 06m

Washington, D.C. Reagan-National

jue. 10/23

6:31 pm-11:50 pm

1 stop8h 19m

$281

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mar. 11/18

6:00 am-6:59 pm

2 stops9h 59m

Washington, D.C. Reagan-National

lun. 11/24

5:05 pm-11:52 pm

1 stop9h 47m

$282

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mié. 11/12

6:00 am-10:08 pm

2 stops13h 08m

Washington, D.C. Reagan-National

mié. 11/19

6:29 am-5:09 pm

2 stops13h 40m

$287

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

jue. 11/13

1:20 pm-11:29 pm

1 stop7h 09m

Washington, D.C. Dulles Intl

sáb. 11/15

7:10 am-12:18 pm

1 stop8h 08m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 $292). Flying from Ontario to District of Columbia in April is currently the most expensive (average of $337). 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 septiembre 15, 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 septiembre 15, 2025.
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
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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. Frontier provides one of the quickest options available for as low as $332. 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 American Airlines. According to our data, you can fly for as low as $130. Users have also found prices from $138 and $139 on Hawaiian 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 $292). Flying from Ontario to District of Columbia in April is currently the most expensive (average of $337). 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.

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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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$98Average$224FlexibilityNo cancel feeOn-time65%
FrontierCheapest$147Average$270FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$226Average$464FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$258Average$469FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$278Average$478FlexibilityNo cancel feeOn-time71%
DeltaCheapest$284Average$425FlexibilityNo cancel feeOn-timeN/A

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