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 $85. Users have also found prices from $163 and $164 on Hawaiian Airlines and American Airlines, respectively.

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

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

How far in advance should I book a flight from Ontario to District of Columbia?

Find a great deal and save up to 71% by booking at least 53 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to District of Columbia within the next two weeks, with the cheapest ticket starting at $388.

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

Our data shows that August tends to be the cheapest month to fly to District of Columbia from Ontario. Users have commonly found prices around $362 for the month, but tickets can be as low as $131. Due to multiple factors, prepare for potentially higher prices in December.

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.

$85+ Flights from Ontario to District of Columbia

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Cheap flight deals from Ontario to District of Columbia

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$162 (Kiwi.com)
One-way from	$85 (Trip.com)
Popular in	December
Cheapest in	August
Average price	$409

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. 8% potential increase in price ($34 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 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 marzo 17, 2025.

mar. 4/112:59 amONT - DCA

1 stop8h 05mFrontier

mié. 4/97:00 amDCA - ONT

1 stop10h 27mFrontier

Deal found 3/15

$162

mié. 5/710:44 amONT - IAD

1 stop16h 47mFrontier

mié. 5/148:01 amIAD - ONT

1 stop26h 23mFrontier

Deal found 3/16

$195

mar. 4/157:00 amONT - DCA

2 stops11h 59mMultiple Airlines

mar. 4/226:00 pmDCA - ONT

1 stop8h 59mMultiple Airlines

Deal found 3/16

$322

jue. 4/2411:46 amONT - IAD

1 stop9h 37mAlaska Airlines

lun. 4/286:30 amIAD - ONT

1 stop12h 02mAlaska Airlines

Deal found 3/17

$326

sáb. 8/912:00 pmONT - DCA

1 stop7h 22mDelta

sáb. 8/231:45 pmDCA - ONT

1 stop8h 44mDelta

Deal found 3/17

$327

mar. 8/510:59 pmONT - IAD

1 stop7h 11mDelta

vie. 8/223:00 pmIAD - ONT

1 stop7h 29mDelta

Deal found 3/17

$327

mar. 4/12:54 pmONT - DCA

1 stop6h 56mAmerican Airlines

mié. 4/97:00 amDCA - ONT

1 stop7h 55mAmerican Airlines

Deal found 3/16

$328

mié. 4/25:00 amONT - DCA

1 stop7h 01mUnited Airlines

mar. 4/88:30 amDCA - ONT

2 stops14h 51mUnited Airlines

Deal found 3/17

$332

mar. 4/19:47 amONT - IAD

2 stops11h 11mAmerican Airlines

mié. 4/92:12 pmIAD - ONT

1 stop9h 47mAmerican Airlines

Deal found 3/16

$334

mié. 5/2811:25 amONT - DCA

2 stops9h 15mSouthwest

mié. 6/43:50 pmDCA - ONT

2 stops9h 40mSouthwest

Deal found 3/16

$357

dom. 6/296:43 pmONT - IAD

1 stop9h 21mUnited Airlines

jue. 7/36:30 amIAD - ONT

1 stop8h 52mUnited Airlines

Deal found 3/17

$362

jue. 6/195:15 amONT - IAD

1 stop8h 50mSouthwest

mar. 6/247:25 amIAD - ONT

2 stops11h 10mSouthwest

Deal found 3/16

$377

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 marzo 17, 2025.

mar. 4/112:59 amONT - DCA

1 stop8h 05mFrontier

mié. 4/97:00 amDCA - ONT

1 stop10h 27mFrontier

Deal found 3/15

$162

mar. 4/157:00 amONT - DCA

2 stops11h 59mMultiple Airlines

mar. 4/226:00 pmDCA - ONT

1 stop8h 59mMultiple Airlines

Deal found 3/16

$322

jue. 4/2411:46 amONT - IAD

1 stop9h 37mAlaska Airlines

lun. 4/286:30 amIAD - ONT

1 stop12h 02mAlaska Airlines

Deal found 3/17

$326

sáb. 8/912:00 pmONT - DCA

1 stop7h 22mDelta

sáb. 8/231:45 pmDCA - ONT

1 stop8h 44mDelta

Deal found 3/17

$327

mar. 4/12:54 pmONT - DCA

1 stop6h 56mAmerican Airlines

mié. 4/97:00 amDCA - ONT

1 stop7h 55mAmerican Airlines

Deal found 3/16

$328

mié. 4/25:00 amONT - DCA

1 stop7h 01mUnited Airlines

mar. 4/88:30 amDCA - ONT

2 stops14h 51mUnited Airlines

Deal found 3/17

$332

mié. 5/2811:25 amONT - DCA

2 stops9h 15mSouthwest

mié. 6/43:50 pmDCA - ONT

2 stops9h 40mSouthwest

Deal found 3/16

$357

mié. 5/710:44 amONT - IAD

1 stop16h 47mFrontier

mié. 5/148:01 amIAD - ONT

1 stop26h 23mFrontier

Deal found 3/16

$195

jue. 4/176:00 amONT - IAD

1 stop8h 59mHawaiian Airlines

jue. 4/2410:00 amIAD - ONT

1 stop10h 30mHawaiian Airlines

Deal found 3/16

$396

mar. 8/510:59 pmONT - IAD

1 stop7h 11mDelta

vie. 8/223:00 pmIAD - ONT

1 stop7h 29mDelta

Deal found 3/17

$327

mar. 4/19:47 amONT - IAD

2 stops11h 11mAmerican Airlines

mié. 4/92:12 pmIAD - ONT

1 stop9h 47mAmerican Airlines

Deal found 3/16

$334

dom. 6/296:43 pmONT - IAD

1 stop9h 21mUnited Airlines

jue. 7/36:30 amIAD - ONT

1 stop8h 52mUnited Airlines

Deal found 3/17

$362

Last-minute flights from Ontario to District of Columbia
Discover last-minute flight deals from Ontario to District of Columbia. Data last updated marzo 17, 2025 and is based on user searches.

dom. 3/239:32 amONT - DCA

2 stops8h 22mAmerican Airlines

vie. 3/286:58 pmDCA - ONT

1 stop7h 56mAmerican Airlines

Deal found 3/16

$780

dom. 3/235:05 amONT - IAD

1 stop7h 38mMultiple Airlines

sáb. 3/297:00 amIAD - ONT

1 stop19h 59mMultiple Airlines

Deal found 3/17

$1,011

mar. 3/2510:18 amONT - DCA

1 stop28h 40mAlaska Airlines

jue. 3/278:00 amDCA - ONT

1 stop13h 23mAlaska Airlines

Deal found 3/16

$706

mié. 3/2612:59 amONT - DCA

1 stop13h 00mFrontier

mié. 4/21:03 pmDCA - ONT

1 stop13h 56mFrontier

Deal found 3/17

$220

mié. 3/269:55 amONT - DCA

1 stop9h 30mSouthwest

mar. 4/16:00 amDCA - ONT

1 stop8h 05mSouthwest

Deal found 3/16

$483

mié. 3/2612:46 pmONT - IAD

1 stop8h 45mDelta

mié. 4/26:00 amIAD - ONT

1 stop8h 36mDelta

Deal found 3/17

$483

mié. 3/265:30 amONT - IAD

2 stops9h 40mSouthwest

mar. 4/17:05 amIAD - ONT

2 stops12h 30mSouthwest

Deal found 3/16

$493

mié. 3/2612:46 pmONT - DCA

1 stop7h 54mDelta

jue. 4/36:59 amDCA - ONT

1 stop7h 30mDelta

Deal found 3/16

$519

mié. 3/266:00 amONT - IAD

1 stop8h 59mAlaska Airlines

mié. 4/97:00 amIAD - ONT

2 stops13h 02mAlaska Airlines

Deal found 3/16

$566

jue. 3/275:05 amONT - IAD

2 stops23h 21mUnited Airlines

dom. 3/306:30 amIAD - ONT

1 stop11h 20mUnited Airlines

Deal found 3/16

$643

jue. 3/279:32 amONT - IAD

2 stops9h 42mAmerican Airlines

dom. 3/306:27 amIAD - ONT

2 stops12h 05mAmerican Airlines

Deal found 3/16

$672

jue. 3/276:00 amONT - DCA

2 stops14h 57mUnited Airlines

dom. 3/308:30 amDCA - ONT

2 stops14h 51mUnited Airlines

Deal found 3/16

$920

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 marzo 17, 2025.

lun. 4/2812:59 amONT - DCA

1 stop8h 10mFrontier

Deal found 3/16

$85

mar. 5/610:44 amONT - IAD

1 stop16h 47mFrontier

Deal found 3/16

$97

vie. 4/256:24 pmONT - IAD

1 stop10h 19mHawaiian Airlines

Deal found 3/17

$163

lun. 3/319:47 amONT - DCA

1 stop7h 22mAmerican Airlines

Deal found 3/16

$164

vie. 6/136:34 pmONT - IAD

1 stop7h 34mUnited Airlines

Deal found 3/17

$164

mié. 4/910:40 pmONT - IAD

1 stop6h 58mAmerican Airlines

Deal found 3/16

$165

vie. 4/119:05 pmONT - DCA

2 stops8h 45mSouthwest

Deal found 3/17

$169

jue. 4/175:35 amONT - IAD

1 stop9h 20mSouthwest

Deal found 3/16

$174

mar. 4/221:20 pmONT - IAD

1 stop7h 11mDelta

Deal found 3/16

$190

mié. 4/166:00 amONT - IAD

1 stop8h 59mAlaska Airlines

Deal found 3/17

$198

dom. 5/257:00 amONT - DCA

1 stop8h 15mUnited Airlines

Deal found 3/16

$209

mar. 4/157:00 amONT - DCA

2 stops11h 59mAlaska Airlines

Deal found 3/16

$227

Find flights from Ontario to District of Columbia within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mar. 4/1

12:59 am-12:04 pm

1 stop8h 05m

Washington, D.C. Reagan-National

mié. 4/9

7:00 am-2:27 pm

1 stop10h 27m

$162

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mié. 5/7

10:44 am-6:31 am

1 stop16h 47m

Washington, D.C. Dulles Intl

mié. 5/14

8:01 am-7:24 am

1 stop26h 23m

$195

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mar. 4/15

7:00 am-9:59 pm

2 stops11h 59m

Washington, D.C. Reagan-National

mar. 4/22

6:00 pm-11:59 pm

1 stop8h 59m

$322

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

jue. 4/24

11:46 am-12:23 am

1 stop9h 37m

Washington, D.C. Dulles Intl

lun. 4/28

6:30 am-3:32 pm

1 stop12h 02m

$326

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

sáb. 8/9

12:00 pm-10:22 pm

1 stop7h 22m

Washington, D.C. Reagan-National

sáb. 8/23

1:45 pm-7:29 pm

1 stop8h 44m

$327

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mar. 8/5

10:59 pm-9:10 am

1 stop7h 11m

Washington, D.C. Dulles Intl

mar. 8/19

3:00 pm-7:29 pm

1 stop7h 29m

$327

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mar. 4/1

2:54 pm-12:50 am

1 stop6h 56m

Washington, D.C. Reagan-National

mié. 4/9

7:00 am-11:55 am

1 stop7h 55m

$328

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mié. 4/2

5:00 am-3:01 pm

1 stop7h 01m

Washington, D.C. Reagan-National

mar. 4/8

8:30 am-8:21 pm

2 stops14h 51m

$332

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mar. 4/1

9:47 am-11:58 pm

2 stops11h 11m

Washington, D.C. Dulles Intl

mié. 4/9

2:12 pm-8:59 pm

1 stop9h 47m

$334

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mié. 5/28

11:25 am-11:40 pm

2 stops9h 15m

Washington, D.C. Reagan-National

mié. 6/4

3:50 pm-10:30 pm

2 stops9h 40m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Showing 1-10 of 27 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.

Travel insights for flights from Ontario to District of Columbia

Get recent, data-driven insights about flights from Ontario to District of Columbia including ideal travel times, pricing trends, and more.

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 $309). Flying from Ontario to District of Columbia in June is currently the most expensive (average of $387). 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?

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.

Rainfall in District of Columbia by month

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.

Temperature in District of Columbia by month

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).

Reviews of airlines servicing District of Columbia

Get a feel of what it's like to fly with Southwest, Alaska Airlines and Delta from Ontario to District of Columbia by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,280 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest

8.1

Very good

4,280 reviews

Southwest

8.1

Very good

4,280 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines

8.0

Very good

9,750 reviews

Southwest

8.1

Very good

4,280 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta

8.0

Very good

7,908 reviews

Southwest

8.1

Very good

4,280 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Hawaiian Airlines

7.9

Good

2,323 reviews

Southwest

8.1

Very good

4,280 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines

7.4

Good

8,611 reviews

Southwest

8.1

Very good

4,280 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.
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 $85. Users have also found prices from $163 and $164 on Hawaiian Airlines and American 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 $309). Flying from Ontario to District of Columbia in June is currently the most expensive (average of $387). 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

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Top 6 airlines flying from Ontario to District of Columbia

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$130	Average$234	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$131	Average$298	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$256	Average$499	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$267	Average$424	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$286	Average$521	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$321	Average$478	FlexibilityNo cancel fee	On-time63%

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$85+ 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 4/28. 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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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 marzo 17, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 marzo 17, 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 marzo 17, 2025.

Find flights from Ontario to District of Columbia within your budget

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.

Travel insights for flights from Ontario to District of Columbia

Get recent, data-driven insights about flights from Ontario to District of Columbia including ideal travel times, pricing trends, and more.

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 marzo 17, 2025.

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

Reviews of airlines servicing District of Columbia

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?

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 marzo 17, 2025.