How long is the flight from Ottawa to Washington, D.C. Dulles Intl Airport?

United Airlines can get you from Ottawa to Washington, D.C. Dulles Intl Airport in just under 1h 58m. Your travel time will be generally consistent. Ottawa and Washington, D.C. Dulles Intl Airport are separated by a distance of 449 mi. Generally, flights for this route are nonstop.

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

Porter Airlines, at $197, was found to be the cheapest airline from Ottawa to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include United Airlines and Air Canada. These flights start at 51% lower than the current average price 3 months from now.

Weekly flight availability from Ottawa to Washington, D.C. Dulles Intl Airport

The most flights from YOW to IAD are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

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.

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).

What are the cheapest flights from Ottawa to Washington, D.C. Dulles Intl Airport?

On average you can expect to pay $653 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $176 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $213.

What are the most reliable airlines from Ottawa to Washington, D.C. Dulles Intl Airport?

Consider Avianca (85%), Republic Airways (78%) or United Airlines (73%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to Washington, D.C. Dulles Intl Airport.

What are the most popular airlines that fly from Ottawa to Washington, D.C. Dulles Intl Airport?

When booking a flight from Ottawa to Washington, D.C. Dulles Intl Airport, you may want to consider flying on Air Canada, United Airlines or Porter Airlines as they are the most popular for this route.

Most accurate provider : When it comes to deals on Ottawa-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ottawa-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 Ottawa-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust eDreams the most. eDreams 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 Ottawa-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.

What airport do you fly from for flights from Ottawa to Washington, D.C. Dulles Intl?

Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly out of when you book flights from Ottawa to Washington, D.C. Dulles Intl. 3 airlines have flights from Ottawa to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Ottawa to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 6 outbound flights to Washington, D.C. Dulles Intl per day.

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

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

How can I find direct flights from Ottawa to Dulles Intl?

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

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

Yes. Cheapflights offers flight deals from Ottawa 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.

$141+ Flights from Ottawa to Washington, D.C. Dulles Intl Airport

Q: How much does it cost to fly round-trip from Ottawa to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment. Ottawa to Washington, D.C. Dulles Intl Airport flights typically cost between $320 and $511 in February. The cheapest round-trip price found within the last 3 days was $270 on Air Canada (Feb 3-Feb 9).

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Find cheap flights from Ottawa to Dulles Intl 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.

Cheapflights Tip: The best prices from Ottawa to Washington, D.C. Dulles Intl are usually found in April or July, booked 60 days in advance, depart on a Saturday or Wednesday and return on a Saturday

Cheap flight deals from Ottawa to Dulles Intl

Cheapest flights from Ottawa to Dulles Intl
Explore the most affordable flight options available from Ottawa to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

Fri 12/191:20 pmYOW - IAD

1 stop3h 54mPorter Airlines

Wed 1/711:35 amIAD - YOW

1 stop3h 29mPorter Airlines

Deal found 12/4

$272

Fri 12/261:20 pmYOW - IAD

1 stop3h 54mPorter Airlines

Wed 1/711:35 amIAD - YOW

1 stop3h 29mPorter Airlines

Deal found 12/4

$279

Fri 12/192:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Thu 1/812:43 pmIAD - YOW

Nonstop1h 44mUnited Airlines

Deal found 12/4

$281

Fri 12/192:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Wed 12/2410:08 pmIAD - YOW

Nonstop1h 46mUnited Airlines

Deal found 12/4

$289

Fri 12/192:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Fri 1/98:29 amIAD - YOW

1 stop5h 03mUnited Airlines

Deal found 12/4

$291

Sat 12/205:59 pmYOW - IAD

1 stop5h 07mUnited Airlines

Thu 1/812:43 pmIAD - YOW

Nonstop1h 44mUnited Airlines

Deal found 12/4

$296

Tue 12/2312:10 pmYOW - IAD

1 stop5h 04mPorter Airlines

Thu 1/811:35 amIAD - YOW

1 stop3h 29mPorter Airlines

Deal found 12/4

$299

Wed 12/242:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Fri 1/210:08 pmIAD - YOW

Nonstop1h 46mUnited Airlines

Deal found 12/3

$302

Sat 12/205:59 pmYOW - IAD

1 stop5h 07mUnited Airlines

Wed 12/2410:08 pmIAD - YOW

Nonstop1h 46mUnited Airlines

Deal found 12/4

$304

Sat 12/205:59 pmYOW - IAD

1 stop5h 07mUnited Airlines

Wed 1/71:05 pmIAD - YOW

1 stop8h 13mUnited Airlines

Deal found 12/4

$306

Sun 12/211:20 pmYOW - IAD

1 stop3h 54mPorter Airlines

Mon 1/511:35 amIAD - YOW

1 stop5h 54mPorter Airlines

Deal found 12/4

$307

Best flights from Ottawa to Dulles Intl
Discover carefully curated flight deals from Ottawa to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 4, 2025.

Fri 12/197:27 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Wed 1/712:43 pmIAD - YOW

Nonstop1h 44mUnited Airlines

Deal found 12/4

$281

Fri 1/26:50 amYOW - IAD

1 stop3h 29mMultiple Airlines

Fri 1/98:40 amIAD - YOW

1 stop8h 33mMultiple Airlines

Deal found 12/4

$284

Fri 12/197:27 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Fri 1/910:10 pmIAD - YOW

Nonstop1h 44mUnited Airlines

Deal found 12/4

$281

Fri 1/307:00 amYOW - IAD

1 stop3h 19mMultiple Airlines

Sat 1/3111:39 amIAD - YOW

2 stops12h 46mMultiple Airlines

Deal found 12/4

$294

Thu 1/82:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Mon 1/125:38 pmIAD - YOW

1 stop4h 18mUnited Airlines

Deal found 12/3

$283

Wed 12/249:45 amYOW - IAD

Nonstop2h 02mUnited Airlines

Fri 1/91:05 pmIAD - YOW

1 stop8h 13mUnited Airlines

Deal found 12/4

$291

Thu 12/257:27 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Wed 1/78:20 amIAD - YOW

1 stop8h 52mUnited Airlines

Deal found 12/4

$291

Thu 12/182:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Thu 1/88:29 amIAD - YOW

1 stop5h 03mUnited Airlines

Deal found 12/4

$291

Mon 1/262:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Thu 2/58:29 amIAD - YOW

1 stop5h 03mUnited Airlines

Deal found 12/2

$295

Thu 1/82:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Fri 1/98:29 amIAD - YOW

1 stop5h 03mUnited Airlines

Deal found 12/2

$295

Sun 1/187:27 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Sun 1/2512:43 pmIAD - YOW

Nonstop1h 44mUnited Airlines

Deal found 12/3

$295

Last-minute flights from Ottawa to Dulles Intl
Discover last-minute flight deals from Ottawa to Dulles Intl. Data last updated December 4, 2025 and is based on user searches.

Fri 12/191:20 pmYOW - IAD

1 stop3h 54mPorter Airlines

Wed 1/711:35 amIAD - YOW

1 stop3h 29mPorter Airlines

Deal found 12/4

$272

Fri 12/192:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Thu 1/812:43 pmIAD - YOW

Nonstop1h 44mUnited Airlines

Deal found 12/4

$281

Fri 12/192:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Wed 12/2410:08 pmIAD - YOW

Nonstop1h 46mUnited Airlines

Deal found 12/4

$289

Fri 12/192:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Fri 1/98:29 amIAD - YOW

1 stop5h 03mUnited Airlines

Deal found 12/4

$291

Fri 12/261:20 pmYOW - IAD

1 stop3h 54mPorter Airlines

Wed 1/711:35 amIAD - YOW

1 stop3h 29mPorter Airlines

Deal found 12/4

$279

Fri 1/26:50 amYOW - IAD

1 stop3h 29mMultiple Airlines

Fri 1/98:40 amIAD - YOW

1 stop8h 33mMultiple Airlines

Deal found 12/4

$284

Thu 1/89:45 amYOW - IAD

Nonstop2h 04mAir Canada

Mon 1/124:30 pmIAD - YOW

1 stop4h 48mAir Canada

Deal found 12/3

$276

Thu 1/82:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Mon 1/125:38 pmIAD - YOW

1 stop4h 18mUnited Airlines

Deal found 12/3

$283

Thu 1/87:27 pmYOW - IAD

Nonstop1h 58mLufthansa

Mon 1/1210:10 pmIAD - YOW

Nonstop1h 44mLufthansa

Deal found 12/3

$294

Thu 1/82:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Fri 1/98:29 amIAD - YOW

1 stop5h 03mUnited Airlines

Deal found 12/2

$295

Sun 1/1810:20 amYOW - IAD

1 stop5h 26mMultiple Airlines

Sun 1/2511:35 amIAD - YOW

1 stop3h 29mMultiple Airlines

Deal found 12/3

$274

One-way flights from Ottawa to Dulles Intl
Search for one-way flight options from Ottawa to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated December 4, 2025.

Sun 1/1810:20 amYOW - IAD

1 stop5h 26mAir Canada

Deal found 12/4

$141

Fri 1/26:50 amYOW - IAD

1 stop3h 29mPorter Airlines

Deal found 12/2

$145

Wed 1/147:00 amYOW - IAD

1 stop3h 19mPorter Airlines

Deal found 12/3

$148

Mon 1/267:00 amYOW - IAD

1 stop3h 19mPorter Airlines

Deal found 12/3

$153

Mon 1/2610:20 amYOW - IAD

1 stop5h 26mAir Canada

Deal found 12/4

$154

Wed 1/142:50 pmYOW - IAD

1 stop6h 04mAir Canada

Deal found 12/3

$157

Sat 1/1710:20 amYOW - IAD

1 stop5h 26mAir Canada

Deal found 12/3

$160

Tue 1/132:15 pmYOW - IAD

Nonstop1h 58mUnited Airlines

Deal found 12/3

$161

Fri 12/196:50 amYOW - IAD

1 stop3h 34mPorter Airlines

Deal found 12/2

$169

Wed 1/144:15 pmYOW - IAD

2 stops22h 00mMultiple Airlines

Deal found 12/3

$171

Sun 3/19:45 amYOW - IAD

Nonstop1h 59mUnited Airlines

Deal found 12/3

$172

Find flight deals from Ottawa to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$268 (Trip.com)
One-way from	$141 (Gotogate)
Popular in	August
Cheapest in	April
Average price	$427
Good round-trip deal	$414 or less
Good one-way deal	$195 or less

Provider with most accurate pricing for Ottawa-Washington, D.C. Dulles Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ottawa-Washington, D.C. Dulles Intl flights.

Search Deals

From Ottawa to Washington, D.C. Dulles Intl

Search Deals

One-way flight from Ottawa to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($51 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from Ottawa to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from Ottawa to Washington, D.C. Dulles Intl.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 12/19

7:27 pm-9:25 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Wed 1/7

12:43 pm-2:27 pm

Nonstop1h 44m

$281

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 12/19

7:27 pm-9:25 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Fri 1/9

10:10 pm-11:54 pm

Nonstop1h 44m

$281

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 1/8

2:15 pm-4:13 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Mon 1/12

5:38 pm-9:56 pm

1 stop4h 18m

$283

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 1/2

6:50 am-10:19 am

1 stop3h 29m

Washington, D.C. Dulles Intl

Fri 1/9

8:40 am-5:13 pm

1 stop8h 33m

$284

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 12/24

9:45 am-11:47 am

Nonstop2h 02m

Washington, D.C. Dulles Intl

Fri 1/9

1:05 pm-9:18 pm

1 stop8h 13m

$291

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 12/25

7:27 pm-9:25 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Wed 1/7

8:20 am-5:12 pm

1 stop8h 52m

$291

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 12/18

2:15 pm-4:13 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Thu 1/8

8:29 am-1:32 pm

1 stop5h 03m

$291

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 1/30

7:00 am-10:19 am

1 stop3h 19m

Washington, D.C. Dulles Intl

Sat 1/31

11:39 am-12:25 am

2 stops12h 46m

$294

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 1/26

2:15 pm-4:13 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Thu 2/5

8:29 am-1:32 pm

1 stop5h 03m

$295

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 1/8

2:15 pm-4:13 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Fri 1/9

8:29 am-1:32 pm

1 stop5h 03m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 21 results

Compare providers for flights from Ottawa to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Dulles Intl in December.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Trip.com	Price Accuracy2 stars	Trust 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 Ottawa-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ottawa-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 Ottawa-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust eDreams the most. eDreams 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 Ottawa-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 Ottawa to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Ottawa 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 Ottawa to Washington, D.C. Dulles Intl Airport

Prices

Airlines

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

The price you pay for your flight from Ottawa 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 58 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 Ottawa to Washington, D.C. Dulles Intl Airport?

Currently, March is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of $158). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of $270). 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 YOW to IAD?

One of the essential ways to save on airfare from Ottawa to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

How much does it cost to fly round-trip from Ottawa to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with Porter Airlines, United Airlines, and Air Canada from Ottawa to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

394 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Porter Airlines

8.0

Very good

394 reviews

Porter Airlines

8.0

Very good

394 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

United Airlines

7.4

Good

9,063 reviews

Porter Airlines

8.0

Very good

394 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Air Canada

7.1

Good

10,500 reviews

Porter Airlines

8.0

Very good

394 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

What airport do you fly from for flights from Ottawa to Washington, D.C. Dulles Intl?
Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly out of when you book flights from Ottawa to Washington, D.C. Dulles Intl. 3 airlines have flights from Ottawa to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Ottawa to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 6 outbound flights to Washington, D.C. Dulles Intl per day.
How long is the flight from Ottawa to Washington, D.C. Dulles Intl Airport?
United Airlines can get you from Ottawa to Washington, D.C. Dulles Intl Airport in just under 1h 58m. Your travel time will be generally consistent. Ottawa and Washington, D.C. Dulles Intl Airport are separated by a distance of 449 mi. Generally, flights for this route are nonstop.
What are the cheapest airlines flying from Ottawa to Washington, D.C. Dulles Intl Airport round-trip?
Porter Airlines, at $197, was found to be the cheapest airline from Ottawa to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include United Airlines and Air Canada. These flights start at 51% lower than the current average price 3 months from now.
What are the most reliable airlines from Ottawa to Washington, D.C. Dulles Intl Airport?
Consider Avianca (85%), Republic Airways (78%) or United Airlines (73%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to Washington, D.C. Dulles Intl Airport.
What are the cheapest flights from Ottawa to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay $653 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $176 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $213.
Can I find deals for flights from Ottawa to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Ottawa to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Dulles Intl.
Can I find deals for business class flights from Ottawa to Dulles Intl?
Yes. Cheapflights offers flight deals from Ottawa 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 Ottawa to Washington, D.C. Dulles Intl Airport?
Currently, March is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of $158). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of $270). 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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Top 3 airlines flying from Ottawa to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	Cheapest$197	Average$307	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$281	Average$443	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$384	Average$446	FlexibilityNo cancel fee	On-time67%

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$141+ Cheap flights from Ottawa (YOW) 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ottawa to Dulles Intl with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Ottawa to Washington, D.C. Dulles Intl are usually found in April or July, booked 60 days in advance, depart on a Saturday or Wednesday and return on a Saturday

Cheap flight deals from Ottawa to Dulles Intl

Cheapest flights from Ottawa to Dulles IntlExplore the most affordable flight options available from Ottawa to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

Explore the most affordable flight options available from Ottawa to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

Find flight deals from Ottawa to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

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Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

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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.

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Everything you need to know about your flight from Ottawa to Washington, D.C. Dulles Intl Airport

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Weekly flight availability from Ottawa to Washington, D.C. Dulles Intl Airport

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with Porter Airlines, United Airlines, and Air Canada from Ottawa to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How long is the flight from Ottawa to Washington, D.C. Dulles Intl Airport?

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

What are the most reliable airlines from Ottawa to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Ottawa to Washington, D.C. Dulles Intl Airport?

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

How can I find direct flights from Ottawa to Dulles Intl?

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

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

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Alternative routes for Ottawa to Dulles Intl

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Top 3 airlines flying from Ottawa to Dulles Intl

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Cheapest flights from Ottawa to Dulles Intl
Explore the most affordable flight options available from Ottawa to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.