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Dulles Intl

$157+ Cheap flights from Ontario (ONT) to Dulles Intl (IAD)

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 12/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAD
Dec 2 — Dec 91
Mon 12/2
Mon 12/9
1 adult, Economy
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The best prices from Ontario to Washington, D.C. Dulles Intl are usually found in February or January, booked 52 days in advance, depart on a Thursday or Saturday and return on a Thursday

Cheap flight deals from Ontario to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 27, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

March

Cheapest in

February

Round-trip from

$336
(Delta)

One-way from

$157
(eDestinos)
Provider with most accurate pricing for Ontario-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Washington, D.C. Dulles Intl flights.
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High demand for flights, 20% potential price rise
Search Deals
Best time to find cheap flights, 38% potential price drop
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From Ontario to Washington, D.C. Dulles Intl
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One-way flight from Ontario to Washington, D.C. Dulles Intl
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Find flight deals from Ontario to Dulles Intl

Cheapest flights from Ontario to Dulles Intl
Explore the most affordable flight options available from Ontario to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 27, 2024.

This Delta deal was found by Cheapflights users on 11/26. 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.
Wed 12/251:05 pmONT - IAD
1 stop7h 14mDelta
Wed 1/86:00 amIAD - ONT
1 stop8h 55mDelta
Deal found 11/26$336
This American Airlines deal was found by Cheapflights users on 11/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:05 amONT - IAD
1 stop7h 06mAmerican Airlines
Mon 1/65:15 pmIAD - ONT
1 stop8h 13mAmerican Airlines
Deal found 11/26$366
This United Airlines deal was found by Cheapflights users on 11/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/241:42 pmONT - IAD
1 stop6h 43mUnited Airlines
Wed 1/16:30 amIAD - ONT
1 stop9h 10mUnited Airlines
Deal found 11/26$436
This Southwest deal was found by Cheapflights users on 11/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1211:30 amONT - IAD
2 stops8h 30mSouthwest
Sun 12/156:45 amIAD - ONT
1 stop10h 15mSouthwest
Deal found 11/26$488
This Alaska Airlines deal was found by Cheapflights users on 11/26. 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.
Mon 12/238:52 pmONT - IAD
1 stop29h 48mAlaska Airlines
Wed 1/86:57 pmIAD - ONT
1 stop23h 14mAlaska Airlines
Deal found 11/26$617

Find flights from Ontario to Dulles Intl within your budget

Customize your flight search to find flights from Ontario to Dulles Intl 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 2,692,183 searches. Data last updated November 27, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 1/11

1:21 pm-11:36 pm

1 stop7h 15m

Washington, D.C. Dulles Intl

Tue 1/28

4:05 pm-10:32 pm

1 stop9h 27m

$336

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 1/11

10:00 am-10:41 pm

2 stops9h 41m

Washington, D.C. Dulles Intl

Tue 1/28

1:52 pm-10:16 pm

2 stops11h 24m

$346

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 1/30

7:07 pm-5:57 pm

1 stop19h 50m

Washington, D.C. Dulles Intl

Sat 2/1

6:57 pm-10:38 am

1 stop18h 41m

$364

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 2/11

9:20 am-11:05 pm

2 stops10h 45m

Washington, D.C. Dulles Intl

Sun 2/16

5:50 pm-11:55 pm

1 stop9h 05m

$391

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sun 1/12

10:47 am-12:29 am

1 stop10h 42m

Washington, D.C. Dulles Intl

Mon 1/20

4:00 pm-8:51 pm

1 stop7h 51m

$396

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 12/17

12:22 pm-2:25 pm

2 stops23h 03m

$157

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 1/29

6:00 am-5:57 pm

1 stop8h 57m

$166

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 12/17

1:25 pm-11:49 pm

1 stop7h 24m

$168

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 1/29

6:00 am-4:14 pm

1 stop7h 14m

$169

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Fri 12/20

6:30 pm-5:08 am

1 stop7h 38m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 12 results
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Compare providers for flights from Ontario to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Dulles Intl in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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 Dulles Intl

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

How far ahead should I book a flight from Ontario to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Dulles Intl. Price data was last updated on November 22, 2024.

The price you pay for your flight from Ontario to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ontario to Washington, D.C. Dulles Intl Airport?

Currently, November is the cheapest month in which you can book a flight from Ontario to Washington, D.C. Dulles Intl Airport (average of $299). Flying from Ontario to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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 IAD?

Find hourly flight availability from Ontario to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 27, 2024.

A simple way to save on the total cost of your ticket is to fly from Ontario to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Ontario to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Dulles Intl. Price data was last updated on November 24, 2024.

Travelers seeking maximum savings on their Ontario to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated November 27, 2024.
Read reviews from past customers who have flown American Airlines, Delta and Alaska Airlines from Ontario to Washington, D.C.. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,979 reviews

Comfort

8.1

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,979 reviews
Southwest
8.1
Very good
4,979 reviews

Comfort

8.1

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,481 reviews
Southwest
8.1
Very good
4,979 reviews

Comfort

8.1

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,730 reviews
Southwest
8.1
Very good
4,979 reviews

Comfort

8.1

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
9,146 reviews
Southwest
8.1
Very good
4,979 reviews

Comfort

8.1

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

WestJet
7.3
Good
2,816 reviews
Southwest
8.1
Very good
4,979 reviews

Comfort

8.1

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to Dulles Intl. 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 Washington, D.C. Dulles Intl?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to Washington, D.C. Dulles Intl. On average, Ontario has 0 outbound flights to Washington, D.C. Dulles Intl per day from 5 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • What are the cheapest airlines flying from Ontario to Washington, D.C. Dulles Intl Airport round-trip?

    Cheapflights users have booked flights from Ontario to Washington, D.C. Dulles Intl Airport round-trip from $336. Other airlines that can offer you cheap pricing are American Airlines, from $346, and Alaska Airlines, from $364. Users have found that Delta is 19% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $157. Alaska Airlines flights start at $166 while deals on Delta start at $168 one-way.

  • Can I find deals for flights from Ontario to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Ontario to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Dulles Intl.

  • Can I find deals for business class flights from Ontario to Dulles Intl?

    Yes. Cheapflights offers flight deals from Ontario to Dulles Intl 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 Washington, D.C. Dulles Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Washington, D.C. Dulles Intl Airport (average of $299). Flying from Ontario to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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 Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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