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

A quick flight from Washington, D.C. Dulles Intl Airport to Ottawa can take about 1h 41m. United Airlines provides one of the quickest options available for as low as $439. There are 449 mi between Washington, D.C. Dulles Intl Airport and Ottawa. All flights are typically nonstop.

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

Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Ottawa is Porter Airlines. Our recent data shows that you can find tickets from as low as $169 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $206 and $230 round-trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Ottawa for 68% less than the average price by searching for these airlines.

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

The most flights from IAD to YOW are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

In terms of precipitation, rainfall in Ottawa ranges from 2.0 - 3.7 inches per month. June is typically the wettest month, when rainfall can reach 3.7 in. February is typically the driest time to visit Ottawa when rainfall is around 2.0 in.

If weather is an important factor for your trip to Ottawa, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 F).

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

The cheapest flight price from Washington, D.C. Dulles Intl Airport to Ottawa is $160. On average you can expect to pay $465. The most popular route, (Washington, D.C. Dulles Intl - Ottawa), can usually be booked for $314.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to Ottawa on time: GoJet (76%), United Airlines (75%), Air Canada (74%).

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

The most popular airlines flying from Washington, D.C. Dulles Intl Airport to Ottawa are United Airlines, Air Canada and Porter Airlines. Something to consider prior to booking your flight.

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

Most trusted provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Ottawa 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 Washington, D.C. Dulles Intl Airport-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Ottawa. 3 airlines have flights to Ottawa from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Ottawa should not be difficult; the airport handles an average of 9 inbound flights from Washington, D.C. Dulles Intl per day.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Dulles Intl to Ottawa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$144+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Ottawa

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Cheap flight deals from Dulles Intl to Ottawa

Cheapest

Best

Last-minute

One-way

Cheapest flights from Dulles Intl to Ottawa
Explore the most affordable flight options available from Dulles Intl to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2026.

Fri 10/163:50 pm -

1 stop5h 52m

Sun 10/1810:40 am -

1 stop4h 30m

Deal found 8/21

$311

Thu 10/153:50 pm -

1 stop5h 52m

Fri 10/1610:40 am -

1 stop4h 30m

Deal found 8/24

$314

Fri 10/163:50 pm -

1 stop5h 52m

Mon 10/1910:40 am -

1 stop4h 30m

Deal found 8/22

$321

Thu 10/83:50 pm -

1 stop5h 52m

Sun 10/1110:40 am -

1 stop4h 30m

Deal found 8/23

$325

Fri 9/253:50 pm -

1 stop4h 12m

Sun 9/2710:40 am -

1 stop4h 30m

Deal found 8/23

$328

Fri 10/23:50 pm -

1 stop5h 52m

Sun 10/410:40 am -

1 stop4h 30m

Deal found 8/23

$330

Sat 10/311:25 am -

1 stop7h 42m

Mon 10/1210:40 am -

1 stop4h 30m

Deal found 8/24

$335

Sun 10/411:25 am -

1 stop6h 27m

Sat 10/1012:15 pm -

1 stop4h 26m

Deal found 8/20

$341

Tue 10/611:25 am -

1 stop6h 27m

Tue 10/1311:15 am -

1 stop3h 45m

Deal found 8/22

$346

Thu 10/2211:25 am -

1 stop6h 27m

Mon 10/2612:15 pm -

1 stop5h 28m

Deal found 8/22

$350

Sun 10/2511:20 am -

1 stop4h 49m

Fri 10/3012:15 pm -

1 stop5h 28m

Deal found 8/20

$351

Best flights from Dulles Intl to Ottawa
Discover carefully curated flight deals from Dulles Intl to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 25, 2026.

Thu 10/88:15 am -

Nonstop1h 41m

Sun 10/116:00 am -

Nonstop1h 43m

Deal found 8/23

$439

Thu 10/291:19 pm -

Nonstop1h 48m

Mon 11/212:15 pm -

1 stop4h 18m

Deal found 8/24

$439

Sat 9/1910:10 pm -

Nonstop1h 44m

Mon 9/216:00 am -

Nonstop1h 43m

Deal found 8/23

$439

Fri 10/168:15 am -

Nonstop1h 41m

Mon 10/1912:15 pm -

1 stop4h 26m

Deal found 8/22

$445

Wed 9/1610:10 pm -

Nonstop1h 44m

Wed 9/236:00 am -

Nonstop1h 43m

Deal found 8/23

$439

Fri 10/98:15 am -

Nonstop1h 41m

Sun 10/1112:15 pm -

1 stop4h 26m

Deal found 8/23

$445

Fri 9/1810:27 pm -

1 stop15h 32m

Tue 9/227:30 pm -

Nonstop1h 44m

Deal found 8/22

$449

Tue 10/612:35 pm -

Nonstop1h 42m

Tue 10/137:30 pm -

Nonstop1h 44m

Deal found 8/22

$451

Wed 9/238:15 am -

Nonstop1h 41m

Sat 9/262:52 pm -

Nonstop1h 43m

Deal found 8/21

$452

Fri 9/188:15 am -

Nonstop1h 41m

Fri 9/256:01 pm -

1 stop4h 58m

Deal found 8/21

$454

Sat 10/312:35 pm -

Nonstop1h 42m

Mon 10/126:01 pm -

1 stop4h 58m

Deal found 8/24

$455

Fri 9/1810:27 pm -

1 stop15h 32m

Fri 10/22:52 pm -

Nonstop1h 43m

Deal found 8/22

$458

Last-minute flights from Dulles Intl to Ottawa
Discover last-minute flight deals from Dulles Intl to Ottawa. Data last updated August 25, 2026 and is based on user searches.

Fri 9/116:13 pm -

1 stop20h 54m

Sun 9/1310:40 am -

1 stop4h 30m

Deal found 8/21

$371

Mon 9/145:20 pm -

1 stop4h 32m

Wed 9/3012:15 pm -

1 stop4h 23m

Deal found 8/24

$388

Fri 9/183:50 pm -

1 stop8h 30m

Mon 9/216:55 am -

1 stop8h 15m

Deal found 8/23

$355

Fri 9/183:50 pm -

1 stop4h 12m

Fri 9/2510:40 am -

1 stop4h 30m

Deal found 8/23

$365

Fri 9/183:50 pm -

1 stop8h 30m

Sat 9/198:55 pm -

1 stop13h 50m

Deal found 8/20

$383

Sat 9/1911:25 am -

1 stop12h 55m

Fri 9/256:25 pm -

1 stop16h 20m

Deal found 8/22

$356

Sun 9/203:50 pm -

1 stop4h 12m

Fri 9/2510:40 am -

1 stop4h 30m

Deal found 8/20

$366

Wed 9/235:20 pm -

1 stop7h 00m

Sat 9/2612:15 pm -

1 stop4h 23m

Deal found 8/21

$374

Thu 9/2411:25 am -

1 stop6h 27m

Thu 10/110:40 am -

1 stop4h 30m

Deal found 8/24

$375

Thu 9/249:04 pm -

2 stops32h 31m

Thu 10/110:40 am -

1 stop4h 30m

Deal found 8/24

$389

Fri 9/253:50 pm -

1 stop4h 12m

Sun 9/2710:40 am -

1 stop4h 30m

Deal found 8/23

$328

Fri 9/253:50 pm -

1 stop4h 12m

Mon 9/2810:40 am -

1 stop4h 30m

Deal found 8/21

$377

One-way flights from Dulles Intl to Ottawa
Search for one-way flight options from Dulles Intl to Ottawa. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.

Sun 9/1311:25 am -

1 stop6h 27m

Deal found 8/21

$144

Sun 10/43:50 pm -

1 stop5h 52m

Deal found 8/21

$145

Thu 10/83:50 pm -

1 stop4h 12m

Deal found 8/24

$146

Sat 9/126:13 pm -

2 stops23h 22m

Deal found 8/22

$151

Wed 9/239:04 pm -

2 stops22h 16m

Deal found 8/21

$156

Thu 9/109:04 pm -

2 stops32h 31m

Deal found 8/21

$157

Wed 9/166:13 pm -

2 stops30h 07m

Deal found 8/22

$162

Thu 12/1711:20 am -

1 stop4h 49m

Deal found 8/23

$164

Sun 12/2011:20 am -

1 stop4h 49m

Deal found 8/24

$166

Thu 10/85:20 pm -

1 stop4h 32m

Deal found 8/24

$167

Thu 9/179:04 pm -

2 stops22h 16m

Deal found 8/22

$168

Find flight deals from Dulles Intl to Ottawa

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$311 (Trip.com)
One-way from	$144 (Trip.com)
Popular in	September
Cheapest in	December
Average price	$492
Good round-trip deal	$438 or less
Good one-way deal	$233 or less

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

Search Deals

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

Search Deals

From Washington, D.C. Dulles Intl to Ottawa

Search Deals

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

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($47 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($22 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 10/8

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Sun 10/11

6:00 am-7:43 am

Nonstop1h 43m

$439

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 10/29

1:19 pm-3:07 pm

Nonstop1h 48m

Ottawa

Mon 11/2

12:15 pm-4:33 pm

1 stop4h 18m

$439

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Sat 9/19

10:10 pm-11:54 pm

Nonstop1h 44m

Ottawa

Mon 9/21

6:00 am-7:43 am

Nonstop1h 43m

$439

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Wed 9/16

10:10 pm-11:54 pm

Nonstop1h 44m

Ottawa

Wed 9/23

6:00 am-7:43 am

Nonstop1h 43m

$439

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 10/16

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Mon 10/19

12:15 pm-4:41 pm

1 stop4h 26m

$445

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 10/9

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Sun 10/11

12:15 pm-4:41 pm

1 stop4h 26m

$445

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 9/18

10:27 pm-1:59 pm

1 stop15h 32m

Ottawa

Tue 9/22

7:30 pm-9:14 pm

Nonstop1h 44m

$449

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Tue 10/6

12:35 pm-2:17 pm

Nonstop1h 42m

Ottawa

Tue 10/13

7:30 pm-9:14 pm

Nonstop1h 44m

$451

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Wed 9/23

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Sat 9/26

2:52 pm-4:35 pm

Nonstop1h 43m

$452

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 9/18

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Fri 9/25

6:01 pm-10:59 pm

1 stop4h 58m

$454

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/22

Showing 1-10 of 23 resultsSorted by cheapest first

Compare providers for flights from Dulles Intl to Ottawa

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

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 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 Washington, D.C. Dulles Intl Airport-Ottawa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Ottawa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Ottawa flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Ottawa 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 Washington, D.C. Dulles Intl Airport-Ottawa 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 Dulles Intl to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Dulles Intl with our price prediction graph.

IAD-YOW

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 Washington, D.C. Dulles Intl Airport to Ottawa

Prices

Airlines

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

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $358). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in September is currently the most expensive (average of $768). 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 IAD to YOW?

When flying from Washington, D.C. Dulles Intl Airport to Ottawa, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 47% versus a flight in the evening.

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

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Ottawa flights typically cost between $462 and $668 in October.
The cheapest round-trip price found within the last 5 days was $311 on Porter Airlines (Oct 16-Oct 18).

Reviews of airlines servicing Ottawa

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Ottawa, such as Porter Airlines,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

458 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Porter Airlines

8.0

Very good

458 reviews

Porter Airlines

8.0

Very good

458 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

United Airlines

7.4

Good

10,115 reviews

Porter Airlines

8.0

Very good

458 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Air Canada

7.1

Good

11,527 reviews

Porter Airlines

8.0

Very good

458 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

What airport do you fly into for flights to Ottawa from Washington, D.C. Dulles Intl?
Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Ottawa. 3 airlines have flights to Ottawa from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Ottawa should not be difficult; the airport handles an average of 9 inbound flights from Washington, D.C. Dulles Intl per day.
How long is the flight from Washington, D.C. Dulles Intl Airport to Ottawa?
A quick flight from Washington, D.C. Dulles Intl Airport to Ottawa can take about 1h 41m. United Airlines provides one of the quickest options available for as low as $439. There are 449 mi between Washington, D.C. Dulles Intl Airport and Ottawa. All flights are typically nonstop.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Ottawa round-trip?
Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Ottawa is Porter Airlines. Our recent data shows that you can find tickets from as low as $169 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $206 and $230 round-trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Ottawa for 68% less than the average price by searching for these airlines.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Ottawa?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to Ottawa on time: GoJet (76%), United Airlines (75%), Air Canada (74%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Ottawa?
The cheapest flight price from Washington, D.C. Dulles Intl Airport to Ottawa is $160. On average you can expect to pay $465. The most popular route, (Washington, D.C. Dulles Intl - Ottawa), can usually be booked for $314.
Can I find deals for flights from Dulles Intl to Ottawa that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Ottawa flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Ottawa?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Ottawa.
Can I find deals for business class flights from Dulles Intl to Ottawa?
Yes. Cheapflights offers flight deals from Dulles Intl to Ottawa 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 Washington, D.C. Dulles Intl Airport to Ottawa?
Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $358). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in September is currently the most expensive (average of $768). 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

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Alternative routes for Dulles Intl to Ottawa

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Reagan-National to Ottawa flights

Baltimore to Ottawa flights

Baltimore to London flights

Reagan-National to London flights

Baltimore to Windsor flights

Baltimore to Kingston flights

Top 3 airlines flying from Dulles Intl to Ottawa

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	Cheapest$169	Average$374	FlexibilityNo cancel fee	On-time52%
Air Canada	Cheapest$206	Average$523	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$230	Average$514	FlexibilityNo cancel fee	On-time69%

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$144+ Cheap flights from Dulles Intl (IAD) to Ottawa (YOW)

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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Dulles Intl to Ottawa

Cheapest flights from Dulles Intl to OttawaExplore the most affordable flight options available from Dulles Intl to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2026.

Explore the most affordable flight options available from Dulles Intl to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2026.

Best flights from Dulles Intl to OttawaDiscover carefully curated flight deals from Dulles Intl to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 25, 2026.

Discover carefully curated flight deals from Dulles Intl to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 25, 2026.

Last-minute flights from Dulles Intl to OttawaDiscover last-minute flight deals from Dulles Intl to Ottawa. Data last updated August 25, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Ottawa. Data last updated August 25, 2026 and is based on user searches.

One-way flights from Dulles Intl to OttawaSearch for one-way flight options from Dulles Intl to Ottawa. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.

Search for one-way flight options from Dulles Intl to Ottawa. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.

Find flight deals from Dulles Intl to Ottawa

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Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

Compare providers for flights from Dulles Intl to Ottawa

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 Dulles Intl to Ottawa in August.

Best time to book a flight from Dulles Intl to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Dulles Intl with our price prediction graph.

Cheapflights Insights

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

What is the cheapest time of day to fly from IAD to YOW?

When flying from Washington, D.C. Dulles Intl Airport to Ottawa, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 47% versus a flight in the evening.

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

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Ottawa flights typically cost between $462 and $668 in October.The cheapest round-trip price found within the last 5 days was $311 on Porter Airlines (Oct 16-Oct 18).

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

The most flights from IAD to YOW are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

Reviews of airlines servicing Ottawa

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Ottawa, such as Porter Airlines,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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

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

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

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

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

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Alternative routes for Dulles Intl to Ottawa

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Complete your trip

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Dulles Intl and Ottawa flights

Browse other Dulles Intl and Ottawa flight options. Last updated on August 25, 2026.

Other flights from Dulles Intl

Browse through other flights departing from Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on August 25, 2026.

Other flights to Ottawa

Explore flights to Ottawa departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 25, 2026.

Popular flight searches

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Top 3 airlines flying from Dulles Intl to Ottawa

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Cheapest flights from Dulles Intl to Ottawa
Explore the most affordable flight options available from Dulles Intl to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2026.

Best flights from Dulles Intl to Ottawa
Discover carefully curated flight deals from Dulles Intl to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 25, 2026.

Last-minute flights from Dulles Intl to Ottawa
Discover last-minute flight deals from Dulles Intl to Ottawa. Data last updated August 25, 2026 and is based on user searches.

One-way flights from Dulles Intl to Ottawa
Search for one-way flight options from Dulles Intl to Ottawa. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.

Washington, D.C. Dulles Intl Airport to Ottawa flights typically cost between $462 and $668 in October.
The cheapest round-trip price found within the last 5 days was $311 on Porter Airlines (Oct 16-Oct 18).