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

A quick flight from Ontario to District of Columbia can take about 12h 39m. Frontier provides one of the quickest options available for as low as $301. The distance between Ontario and District of Columbia is about 2258 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.

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.

$61+ Flights from Ontario to District of Columbia

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ontario to District of Columbia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 December 18, 2025.

Thu 12/256:45 amONT - DCA

1 stop7h 14mFrontier

Wed 1/76:00 pmDCA - ONT

1 stop8h 14mFrontier

Deal found 12/16

$253

Wed 12/246:45 amONT - DCA

1 stop12h 14mFrontier

Sat 1/106:00 pmDCA - ONT

1 stop8h 14mFrontier

Deal found 12/16

$254

Fri 12/266:45 amONT - DCA

1 stop27h 16mFrontier

Wed 1/76:00 pmDCA - ONT

1 stop8h 14mFrontier

Deal found 12/17

$265

Wed 12/246:45 amONT - DCA

1 stop12h 14mFrontier

Fri 1/96:00 pmDCA - ONT

1 stop8h 56mFrontier

Deal found 12/16

$268

Thu 12/256:45 amONT - DCA

1 stop12h 14mFrontier

Sat 1/106:00 pmDCA - ONT

1 stop8h 14mFrontier

Deal found 12/16

$274

Wed 12/246:45 amONT - DCA

1 stop12h 14mFrontier

Tue 1/62:00 pmDCA - ONT

1 stop11h 12mFrontier

Deal found 12/16

$278

Wed 12/246:45 amONT - DCA

1 stop12h 14mFrontier

Mon 1/52:00 pmDCA - ONT

1 stop12h 59mFrontier

Deal found 12/16

$284

Mon 12/226:45 amONT - DCA

1 stop12h 14mFrontier

Fri 1/26:00 pmDCA - ONT

1 stop8h 59mFrontier

Deal found 12/16

$288

Sun 12/216:45 amONT - DCA

1 stop12h 14mFrontier

Fri 1/26:00 pmDCA - ONT

1 stop8h 59mFrontier

Deal found 12/15

$294

Thu 12/256:45 amONT - DCA

1 stop12h 14mFrontier

Tue 1/62:00 pmDCA - ONT

1 stop11h 12mFrontier

Deal found 12/16

$298

Thu 12/251:15 pmONT - IAD

1 stop7h 03mDelta

Wed 1/77:05 amIAD - ONT

1 stop8h 11mDelta

Deal found 12/16

$341

Thu 12/251:15 pmONT - IAD

1 stop7h 03mDelta

Sat 1/106:20 amIAD - ONT

1 stop8h 11mDelta

Deal found 12/16

$355

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 December 18, 2025.

Mon 2/26:20 amONT - DCA

1 stop12h 39mFrontier

Fri 2/131:00 pmDCA - ONT

1 stop13h 59mFrontier

Deal found 12/15

$301

Thu 2/56:00 amONT - IAD

1 stop31h 26mAlaska Airlines

Sun 2/86:04 pmIAD - ONT

1 stop19h 55mAlaska Airlines

Deal found 12/15

$306

Sat 2/77:30 amONT - IAD

1 stop12h 40mDelta

Mon 2/97:30 amIAD - ONT

1 stop18h 14mDelta

Deal found 12/15

$307

Thu 12/2512:45 pmONT - DCA

1 stop8h 10mSouthwest

Thu 1/14:35 pmDCA - ONT

1 stop7h 10mSouthwest

Deal found 12/17

$363

Wed 1/2811:53 amONT - IAD

1 stop25h 33mAlaska Airlines

Sun 2/86:04 pmIAD - ONT

1 stop19h 55mAlaska Airlines

Deal found 12/15

$306

Thu 1/86:00 amONT - IAD

2 stops14h 10mDelta

Sun 1/117:30 amIAD - ONT

1 stop9h 26mDelta

Deal found 12/14

$312

Tue 3/37:30 amONT - DCA

1 stop25h 34mFrontier

Thu 3/128:00 amDCA - ONT

1 stop19h 01mFrontier

Deal found 12/15

$325

Fri 2/611:53 amONT - IAD

1 stop25h 33mAlaska Airlines

Sun 2/86:04 pmIAD - ONT

1 stop19h 55mAlaska Airlines

Deal found 12/15

$306

Sat 1/1712:41 pmONT - DCA

1 stop7h 51mDelta

Sat 1/244:00 pmDCA - ONT

1 stop8h 05mDelta

Deal found 12/16

$347

Mon 12/226:45 amONT - DCA

1 stop12h 14mFrontier

Mon 1/52:00 pmDCA - ONT

1 stop12h 59mFrontier

Deal found 12/15

$363

Tue 1/207:56 pmONT - IAD

2 stops17h 30mAlaska Airlines

Tue 1/276:04 pmIAD - ONT

1 stop29h 32mAlaska Airlines

Deal found 12/16

$335

Sat 1/1712:41 pmONT - IAD

1 stop7h 56mDelta

Sat 1/246:00 amIAD - ONT

1 stop8h 31mDelta

Deal found 12/16

$347

Wed 3/44:02 pmONT - IAD

1 stop22h 18mAlaska Airlines

Tue 3/107:05 amIAD - ONT

1 stop18h 39mAlaska Airlines

Deal found 12/16

$345

Sat 2/146:00 amONT - DCA

1 stop8h 00mFrontier

Wed 2/188:00 amDCA - ONT

2 stops13h 22mFrontier

Deal found 12/15

$382

Thu 1/812:41 pmONT - DCA

1 stop6h 52mDelta

Sat 1/171:40 pmDCA - ONT

1 stop10h 25mDelta

Deal found 12/15

$362

Sat 1/1711:53 amONT - IAD

1 stop25h 33mAlaska Airlines

Wed 1/216:04 pmIAD - ONT

1 stop24h 04mAlaska Airlines

Deal found 12/17

$345

Thu 12/2511:15 amONT - DCA

1 stop8h 41mDelta

Thu 1/15:11 pmDCA - ONT

1 stop8h 22mDelta

Deal found 12/15

$363

Fri 1/164:03 pmONT - DCA

1 stop26h 56mAlaska Airlines

Wed 1/215:01 pmDCA - ONT

1 stop20h 58mAlaska Airlines

Deal found 12/17

$346

Sat 2/77:00 amONT - DCA

2 stops11h 59mAlaska Airlines

Mon 2/95:01 pmDCA - ONT

1 stop9h 55mAlaska Airlines

Deal found 12/15

$375

Fri 3/136:14 amONT - DCA

1 stop12h 45mAlaska Airlines

Sat 3/148:00 amDCA - ONT

1 stop18h 32mAlaska Airlines

Deal found 12/17

$376

Last-minute flights from Ontario to District of Columbia
Discover last-minute flight deals from Ontario to District of Columbia. Data last updated December 18, 2025 and is based on user searches.

Wed 1/77:00 amONT - DCA

1 stop11h 59mFrontier

Sat 1/106:00 pmDCA - ONT

1 stop8h 14mFrontier

Deal found 12/16

$178

Sat 1/107:00 amONT - DCA

1 stop11h 59mFrontier

Wed 1/218:59 amDCA - ONT

1 stop9h 08mFrontier

Deal found 12/16

$165

Sun 1/118:31 amONT - IAD

1 stop9h 25mFrontier

Tue 1/136:00 amIAD - ONT

2 stops19h 59mFrontier

Deal found 12/15

$259

Mon 1/126:00 amONT - DCA

1 stop7h 59mFrontier

Wed 1/148:00 amDCA - ONT

1 stop17h 59mFrontier

Deal found 12/17

$166

Wed 1/147:15 amONT - DCA

1 stop11h 44mFrontier

Sat 1/172:00 pmDCA - ONT

1 stop11h 59mFrontier

Deal found 12/17

$133

Thu 1/158:02 amONT - IAD

1 stop9h 02mFrontier

Sun 1/1811:00 amIAD - ONT

1 stop11h 01mFrontier

Deal found 12/16

$217

Fri 1/166:10 amONT - DCA

1 stop27h 52mFrontier

Tue 1/206:00 pmDCA - ONT

1 stop24h 07mFrontier

Deal found 12/16

$146

Fri 1/166:10 amONT - DCA

1 stop27h 52mFrontier

Wed 1/218:59 amDCA - ONT

1 stop9h 08mFrontier

Deal found 12/17

$147

Wed 1/217:15 amONT - DCA

1 stop26h 47mFrontier

Mon 1/266:00 pmDCA - ONT

1 stop9h 20mFrontier

Deal found 12/16

$171

Sat 1/247:15 amONT - DCA

1 stop6h 44mFrontier

Tue 1/271:00 pmDCA - ONT

1 stop29h 07mFrontier

Deal found 12/17

$155

Mon 1/266:20 amONT - DCA

1 stop12h 39mFrontier

Wed 1/288:59 amDCA - ONT

1 stop9h 08mFrontier

Deal found 12/17

$174

Mon 1/266:20 amONT - DCA

1 stop7h 39mFrontier

Thu 1/292:00 pmDCA - ONT

1 stop13h 20mFrontier

Deal found 12/17

$180

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 December 18, 2025.

Tue 1/137:15 amONT - DCA

1 stop11h 44mFrontier

Deal found 12/17

$61

Wed 1/147:15 amONT - DCA

1 stop11h 44mFrontier

Deal found 12/17

$62

Tue 2/247:30 amONT - DCA

1 stop25h 34mFrontier

Deal found 12/16

$63

Sat 2/146:00 amONT - DCA

1 stop12h 59mFrontier

Deal found 12/16

$72

Tue 1/277:15 amONT - DCA

1 stop11h 44mFrontier

Deal found 12/15

$73

Tue 2/37:15 amONT - DCA

1 stop6h 44mFrontier

Deal found 12/17

$74

Fri 1/166:10 amONT - DCA

1 stop27h 52mFrontier

Deal found 12/17

$76

Wed 1/217:15 amONT - DCA

1 stop26h 47mFrontier

Deal found 12/17

$80

Thu 2/266:05 amONT - DCA

1 stop7h 55mFrontier

Deal found 12/16

$83

Thu 1/156:10 amONT - DCA

1 stop12h 49mFrontier

Deal found 12/16

$84

Thu 1/296:20 amONT - DCA

1 stop12h 39mFrontier

Deal found 12/17

$85

Sat 2/288:09 pmONT - IAD

2 stops11h 24mFrontier

Deal found 12/16

$90

Find flight deals from Ontario to District of Columbia

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$133 (Kiwi.com)
One-way from	$61 (Trip.com)
Popular in	December
Cheapest in	August
Average price	$477

Provider with most accurate pricing for Los Angeles-Washington, D.C. (WAS) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Los Angeles-Washington, D.C. (WAS) flights.

Search Deals

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. 13% potential increase in price ($59 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 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 2/2

6:20 am-9:59 pm

1 stop12h 39m

Washington, D.C. Reagan-National

Fri 2/13

1:00 pm-11:59 pm

1 stop13h 59m

$301

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 2/5

6:00 am-4:26 pm

1 stop31h 26m

Washington, D.C. Dulles Intl

Sun 2/8

6:04 pm-10:59 am

1 stop19h 55m

$306

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 1/28

11:53 am-4:26 pm

1 stop25h 33m

Washington, D.C. Dulles Intl

Sun 2/8

6:04 pm-10:59 am

1 stop19h 55m

$306

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Fri 2/6

11:53 am-4:26 pm

1 stop25h 33m

Washington, D.C. Dulles Intl

Sun 2/8

6:04 pm-10:59 am

1 stop19h 55m

$306

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/7

7:30 am-11:10 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

Mon 2/9

7:30 am-10:44 pm

1 stop18h 14m

$307

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 1/8

6:00 am-11:10 pm

2 stops14h 10m

Washington, D.C. Dulles Intl

Sun 1/11

7:30 am-1:56 pm

1 stop9h 26m

$312

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 3/3

7:30 am-12:04 pm

1 stop25h 34m

Washington, D.C. Reagan-National

Thu 3/12

8:00 am-12:01 am

1 stop19h 01m

$325

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 1/20

7:56 pm-4:26 pm

2 stops17h 30m

Washington, D.C. Dulles Intl

Tue 1/27

6:04 pm-8:36 pm

1 stop29h 32m

$335

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 3/4

4:02 pm-5:20 pm

1 stop22h 18m

Washington, D.C. Dulles Intl

Tue 3/10

7:05 am-10:44 pm

1 stop18h 39m

$345

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 1/17

11:53 am-4:26 pm

1 stop25h 33m

Washington, D.C. Dulles Intl

Wed 1/21

6:04 pm-3:08 pm

1 stop24h 04m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 42 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 $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.

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

7.9

Good

4,250 reviews

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

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

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

8,005 reviews

Southwest

7.9

Good

4,250 reviews

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

9,091 reviews

Southwest

7.9

Good

4,250 reviews

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

11,054 reviews

Southwest

7.9

Good

4,250 reviews

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

5.8

Fair

3,081 reviews

Southwest

7.9

Good

4,250 reviews

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

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 12h 39m. Frontier provides one of the quickest options available for as low as $301. The distance between Ontario and District of Columbia is about 2258 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to District of Columbia

Los Angeles to John F Kennedy Intl flights

Los Angeles to Newark flights

San Francisco to Las Vegas flights

San Francisco to John F Kennedy Intl flights

Los Angeles to Seattle flights

Los Angeles to Honolulu flights

Los Angeles to Dallas/Fort Worth flights

Los Angeles to LaGuardia flights

San Francisco to Newark flights

San Francisco to Honolulu flights

Los Angeles to Las Vegas flights

Los Angeles to Miami flights

Los Angeles to San Francisco flights

San Francisco to Dallas/Fort Worth flights

Los Angeles to Fort Lauderdale flights

Los Angeles to Orlando flights

Burbank to Las Vegas flights

Santa Ana to Las Vegas flights

San Francisco to Los Angeles flights

Los Angeles to O'Hare Intl flights

Los Angeles to Boston flights

San Jose to Las Vegas flights

Ontario to Seattle flights

Ontario to San Francisco flights

San Francisco to LaGuardia flights

Los Angeles to Hobby flights

Los Angeles to Denver flights

San Jose to Los Angeles flights

San Francisco to Ontario flights

Ontario to Dallas/Fort Worth flights

San Francisco to Orlando flights

Oakland to Las Vegas flights

Los Angeles to Salt Lake City flights

Santa Ana to Dallas/Fort Worth flights

San Francisco to Kahului flights

San Diego to John F Kennedy Intl flights

Los Angeles to Reagan-National flights

Los Angeles to Kahului flights

San Francisco to Seattle flights

San Francisco to Miami flights

San Francisco to San Diego flights

Burbank to LaGuardia flights

San Francisco to Sky Harbor Intl flights

Los Angeles to Sky Harbor Intl flights

Ontario to John F Kennedy Intl flights

Los Angeles to George Bush Intcntl flights

San Francisco to Denver flights

Los Angeles to San Jose flights

Los Angeles to Atlanta flights

San Francisco to O'Hare Intl flights

Top 6 airlines flying from Ontario to District of Columbia

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$98	Average$224	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$147	Average$275	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$226	Average$454	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$258	Average$460	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$276	Average$387	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$278	Average$468	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$61+ 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 1/13. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap 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 December 18, 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 December 18, 2025.

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 December 18, 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 December 18, 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 December 13, 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

100% Free

Book with Flexibility

Travel Smart

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 December 18, 2025.