How long is the flight from Ontario to District of Columbia?

A quick flight from Ontario to District of Columbia can take about 6h 20m. Frontier provides one of the quickest options available for as low as $325. 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 Delta. According to our data, you can fly for as low as $160. Users have also found prices from $173 and $215 on Alaska Airlines and United Airlines, respectively.

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.

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).

What are the most popular airlines that fly from Ontario to District of Columbia?

Frontier, American Airlines and Southwest are the most popular airlines when flying from Ontario to District of Columbia.

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.

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.

$65+ Flights from Ontario to District of Columbia

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1. Tell us where you want to go

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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 October 30, 2025.

Wed 11/58:45 amONT - DCA

1 stop10h 14mFrontier

Sat 11/86:00 pmDCA - ONT

1 stop8h 50mFrontier

Deal found 10/28

$222

Tue 11/48:45 amONT - DCA

1 stop25h 17mFrontier

Thu 11/62:00 pmDCA - ONT

1 stop24h 10mFrontier

Deal found 10/28

$224

Thu 12/412:04 pmONT - DCA

1 stop6h 55mFrontier

Sun 12/78:00 amDCA - ONT

1 stop10h 06mFrontier

Deal found 10/29

$226

Sat 12/63:20 pmONT - DCA

1 stop22h 39mFrontier

Fri 12/126:00 pmDCA - ONT

1 stop23h 25mFrontier

Deal found 10/28

$227

Fri 12/53:20 pmONT - DCA

1 stop27h 39mFrontier

Mon 12/88:00 amDCA - ONT

1 stop9h 25mFrontier

Deal found 10/28

$228

Mon 11/106:53 amONT - DCA

1 stop7h 06mFrontier

Sat 11/156:00 pmDCA - ONT

2 stops32h 40mFrontier

Deal found 10/28

$229

Mon 11/176:53 amONT - DCA

1 stop12h 06mFrontier

Mon 11/242:00 pmDCA - ONT

1 stop12h 57mFrontier

Deal found 10/29

$231

Sat 11/156:53 amONT - DCA

1 stop12h 06mFrontier

Tue 11/258:00 amDCA - ONT

1 stop10h 26mFrontier

Deal found 10/27

$232

Wed 11/2612:58 amONT - DCA

1 stop18h 01mFrontier

Thu 12/46:00 pmDCA - ONT

1 stop23h 25mFrontier

Deal found 10/28

$233

Wed 11/198:45 amONT - DCA

1 stop10h 14mFrontier

Mon 11/246:00 pmDCA - ONT

1 stop8h 57mFrontier

Deal found 10/29

$235

Tue 11/188:45 amONT - DCA

1 stop10h 14mFrontier

Fri 11/212:00 pmDCA - ONT

1 stop12h 57mFrontier

Deal found 10/30

$243

Tue 11/181:20 pmONT - IAD

1 stop7h 38mDelta

Thu 11/206:00 amIAD - ONT

1 stop8h 06mDelta

Deal found 10/28

$319

Best flights from Ontario to District of Columbia
Discover carefully curated flight deals from Ontario to District of Columbia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2025.

Mon 11/174:05 pmONT - DCA

1 stop21h 54mFrontier

Thu 11/208:00 amDCA - ONT

2 stops16h 06mFrontier

Deal found 10/28

$277

Tue 11/181:20 pmONT - IAD

1 stop7h 38mDelta

Thu 11/206:00 amIAD - ONT

1 stop8h 06mDelta

Deal found 10/28

$319

Mon 2/26:30 amONT - IAD

1 stop6h 20mSouthwest

Wed 2/45:30 pmIAD - ONT

1 stop7h 15mSouthwest

Deal found 10/29

$325

Thu 12/45:05 amONT - IAD

1 stop8h 25mUnited Airlines

Mon 12/86:30 amIAD - ONT

1 stop8h 47mUnited Airlines

Deal found 10/29

$325

Wed 11/2611:59 pmONT - IAD

2 stops10h 13mAmerican Airlines

Fri 11/286:04 amIAD - ONT

1 stop8h 49mAmerican Airlines

Deal found 10/28

$408

Wed 12/316:45 amONT - DCA

1 stop12h 14mFrontier

Fri 1/26:00 pmDCA - ONT

1 stop8h 59mFrontier

Deal found 10/28

$324

Wed 12/312:12 pmONT - DCA

1 stop8h 28mDelta

Mon 12/84:15 pmDCA - ONT

1 stop9h 49mDelta

Deal found 10/29

$325

Thu 12/118:55 pmONT - DCA

2 stops8h 50mSouthwest

Wed 12/176:00 amDCA - ONT

1 stop7h 35mSouthwest

Deal found 10/30

$357

Wed 12/312:12 pmONT - IAD

1 stop9h 00mDelta

Mon 12/85:59 pmIAD - ONT

1 stop8h 05mDelta

Deal found 10/29

$325

Tue 12/96:00 amONT - DCA

1 stop6h 58mUnited Airlines

Fri 12/122:54 pmDCA - ONT

1 stop9h 55mUnited Airlines

Deal found 10/29

$371

Wed 12/312:12 pmONT - IAD

1 stop9h 00mDelta

Tue 12/96:00 amIAD - ONT

1 stop8h 02mDelta

Deal found 10/29

$325

Sun 2/112:55 pmONT - DCA

1 stop6h 45mSouthwest

Wed 2/49:30 amDCA - ONT

2 stops9h 35mSouthwest

Deal found 10/29

$372

Thu 11/276:00 amONT - DCA

1 stop7h 00mDelta

Thu 12/49:36 amDCA - ONT

2 stops13h 03mDelta

Deal found 10/30

$327

Mon 11/1710:25 pmONT - DCA

2 stops10h 16mDelta

Thu 11/203:06 pmDCA - ONT

2 stops11h 46mDelta

Deal found 10/28

$329

Fri 2/2010:30 pmONT - IAD

1 stop8h 21mDelta

Tue 2/247:15 amIAD - ONT

1 stop8h 19mDelta

Deal found 10/28

$348

Thu 12/412:12 pmONT - DCA

1 stop6h 29mDelta

Tue 12/96:21 pmDCA - ONT

1 stop7h 43mDelta

Deal found 10/29

$352

Thu 12/410:25 pmONT - DCA

1 stop7h 45mDelta

Wed 12/106:00 amDCA - ONT

1 stop8h 02mDelta

Deal found 10/29

$353

Wed 11/1911:44 amONT - IAD

1 stop9h 32mDelta

Sun 11/237:15 amIAD - ONT

1 stop12h 54mDelta

Deal found 10/28

$368

Fri 12/51:29 pmONT - IAD

1 stop7h 00mDelta

Tue 12/95:59 pmIAD - ONT

1 stop8h 05mDelta

Deal found 10/29

$371

Fri 11/216:00 amONT - DCA

1 stop7h 00mDelta

Mon 11/243:06 pmDCA - ONT

2 stops11h 46mDelta

Deal found 10/28

$373

Sat 11/221:20 pmONT - IAD

1 stop7h 38mDelta

Thu 11/2712:36 pmIAD - ONT

1 stop10h 06mDelta

Deal found 10/28

$389

Mon 2/210:30 pmONT - IAD

2 stops12h 05mDelta

Wed 2/412:23 pmIAD - ONT

2 stops11h 44mDelta

Deal found 10/29

$392

Last-minute flights from Ontario to District of Columbia
Discover last-minute flight deals from Ontario to District of Columbia. Data last updated October 30, 2025 and is based on user searches.

Tue 11/48:45 amONT - DCA

1 stop25h 17mFrontier

Thu 11/62:00 pmDCA - ONT

1 stop24h 10mFrontier

Deal found 10/28

$224

Wed 11/58:45 amONT - DCA

1 stop10h 14mFrontier

Sat 11/86:00 pmDCA - ONT

1 stop8h 50mFrontier

Deal found 10/28

$222

Mon 11/106:53 amONT - DCA

1 stop7h 06mFrontier

Thu 11/138:15 amDCA - ONT

1 stop18h 35mFrontier

Deal found 10/29

$226

Mon 11/106:53 amONT - DCA

1 stop7h 06mFrontier

Sat 11/156:00 pmDCA - ONT

2 stops32h 40mFrontier

Deal found 10/28

$229

Fri 11/146:53 amONT - DCA

1 stop12h 06mFrontier

Mon 11/176:00 pmDCA - ONT

1 stop8h 50mFrontier

Deal found 10/30

$233

Sat 11/156:53 amONT - DCA

1 stop12h 06mFrontier

Tue 11/258:00 amDCA - ONT

1 stop10h 26mFrontier

Deal found 10/27

$232

Mon 11/176:53 amONT - DCA

1 stop12h 06mFrontier

Mon 11/242:00 pmDCA - ONT

1 stop12h 57mFrontier

Deal found 10/29

$231

Mon 11/1710:25 pmONT - IAD

1 stop7h 45mDelta

Thu 11/206:00 amIAD - ONT

1 stop8h 06mDelta

Deal found 10/28

$319

Wed 11/198:45 amONT - DCA

1 stop10h 14mFrontier

Mon 11/246:00 pmDCA - ONT

1 stop8h 57mFrontier

Deal found 10/29

$235

Wed 11/198:45 amONT - DCA

1 stop10h 14mFrontier

Sun 11/232:00 pmDCA - ONT

1 stop24h 28mFrontier

Deal found 10/29

$243

Thu 11/2012:23 pmONT - DCA

1 stop6h 36mFrontier

Sun 11/232:00 pmDCA - ONT

1 stop12h 57mFrontier

Deal found 10/29

$245

Sun 11/2312:58 amONT - DCA

1 stop18h 01mFrontier

Thu 12/46:00 pmDCA - ONT

1 stop23h 25mFrontier

Deal found 10/30

$244

One-way flights from Ontario to District of Columbia
Search for one-way flight options from Ontario to District of Columbia. Find affordable one-way fares based on user searches. Data last updated October 30, 2025.

Thu 11/2012:23 pmONT - DCA

1 stop6h 36mFrontier

Deal found 10/30

$65

Wed 1/287:00 amONT - DCA

1 stop11h 59mFrontier

Deal found 10/28

$67

Mon 12/153:20 pmONT - DCA

1 stop18h 46mFrontier

Deal found 10/28

$68

Mon 2/96:00 amONT - DCA

1 stop28h 05mFrontier

Deal found 10/30

$70

Thu 2/126:56 pmONT - IAD

1 stop11h 58mFrontier

Deal found 10/30

$70

Wed 11/198:45 amONT - DCA

1 stop10h 14mFrontier

Deal found 10/30

$71

Fri 11/146:53 amONT - DCA

1 stop7h 03mFrontier

Deal found 10/30

$72

Tue 2/37:00 amONT - DCA

1 stop11h 59mFrontier

Deal found 10/30

$73

Sat 12/63:20 pmONT - DCA

1 stop22h 39mFrontier

Deal found 10/30

$74

Wed 11/128:45 amONT - DCA

1 stop25h 17mFrontier

Deal found 10/29

$77

Sun 2/16:56 pmONT - IAD

1 stop11h 58mFrontier

Deal found 10/30

$77

Mon 11/176:53 amONT - DCA

1 stop12h 06mFrontier

Deal found 10/30

$78

Cheap flight deals from Ontario to District of Columbia

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$226 (Frontier)
One-way from	$65 (Frontier)
Popular in	December
Cheapest in	August
Average price	$387

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

Search Deals

One-way flight from Ontario to District of Columbia

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($42 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 11/17

4:05 pm-4:59 pm

1 stop21h 54m

Washington, D.C. Reagan-National

Thu 11/20

8:00 am-9:06 pm

2 stops16h 06m

$277

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 11/18

1:20 pm-11:58 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

Thu 11/20

6:00 am-11:06 am

1 stop8h 06m

$319

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 12/31

6:45 am-9:59 pm

1 stop12h 14m

Washington, D.C. Reagan-National

Fri 1/2

6:00 pm-11:59 pm

1 stop8h 59m

$324

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Mon 2/2

6:30 am-3:50 pm

1 stop6h 20m

Washington, D.C. Dulles Intl

Wed 2/4

5:30 pm-9:45 pm

1 stop7h 15m

$325

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 12/4

5:05 am-4:30 pm

1 stop8h 25m

Washington, D.C. Dulles Intl

Mon 12/8

6:30 am-12:17 pm

1 stop8h 47m

$325

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 12/3

12:12 pm-11:40 pm

1 stop8h 28m

Washington, D.C. Reagan-National

Mon 12/8

4:15 pm-11:04 pm

1 stop9h 49m

$325

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 12/3

12:12 pm-12:12 am

1 stop9h 00m

Washington, D.C. Dulles Intl

Mon 12/8

5:59 pm-11:04 pm

1 stop8h 05m

$325

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 12/3

12:12 pm-12:12 am

1 stop9h 00m

Washington, D.C. Dulles Intl

Tue 12/9

6:00 am-11:02 am

1 stop8h 02m

$325

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 11/27

6:00 am-4:00 pm

1 stop7h 00m

Washington, D.C. Reagan-National

Thu 12/4

9:36 am-7:39 pm

2 stops13h 03m

$327

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 11/17

10:25 pm-11:41 am

2 stops10h 16m

Washington, D.C. Reagan-National

Thu 11/20

3:06 pm-11:52 pm

2 stops11h 46m

$329

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 44 results

...

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 $165). 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?

One of the essential ways to save on airfare from Ontario to District of Columbia is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 17% on airfare.

What is the cheapest day to fly from Ontario to District of Columbia?

Travelers seeking maximum savings on their Ontario to District of Columbia flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing District of Columbia

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

4,243 reviews

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

4,243 reviews

Southwest

8.0

Very good

4,243 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

7.9

Good

7,998 reviews

Southwest

8.0

Very good

4,243 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,998 reviews

Southwest

8.0

Very good

4,243 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,035 reviews

Southwest

8.0

Very good

4,243 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.8

Fair

3,122 reviews

Southwest

8.0

Very good

4,243 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

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 6h 20m. Frontier provides one of the quickest options available for as low as $325. 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 Delta. According to our data, you can fly for as low as $160. Users have also found prices from $173 and $215 on Alaska Airlines and United Airlines, 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 $165). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Ontario to District of Columbia

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$98	Average$212	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$147	Average$275	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$226	Average$453	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$258	Average$462	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$278	Average$477	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$284	Average$420	FlexibilityNo cancel fee	On-timeN/A

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$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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to District of Columbia with Cheapflights

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Find flight deals from Ontario to District of Columbia

Cheapest flights from Ontario to District of ColumbiaExplore 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 October 30, 2025.

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 October 30, 2025.

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 October 30, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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.

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?

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 October 30, 2025.

What is the cheapest day to fly from Ontario to District of Columbia?

Use this chart to determine the cheapest time to fly round-trip from Ontario to District of Columbia. Price data was last updated on October 26, 2025.

Reviews of airlines servicing District of Columbia

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.

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?

How long is the flight from Ontario to District of Columbia?

What are the cheapest airlines to fly from Ontario to District of Columbia one-way?

Can I find deals for flights from Ontario to District of Columbia that include hotel bookings?

How can I find direct flights from Ontario to District of Columbia?

Can I find deals for business class flights from Ontario to District of Columbia?

What is the cheapest month to book a flight from Ontario to District of Columbia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

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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 October 30, 2025.