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

Air Canada and Porter Airlines can get you from Ottawa to Washington, D.C. Dulles Intl Airport in just under 6h 25m. Your travel time can differ by up to 06m. Ottawa and Washington, D.C. Dulles Intl Airport are separated by a distance of 449 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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 Air Canada and United Airlines. These flights start at 47% lower than the current average price 3 months from now.

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

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

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

The most flights from YOW to IAD are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, 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 $570 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $194 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $293.

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

Consider GoJet (59%), Air Canada (59%) or United Airlines (59%) 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, Porter Airlines or United Airlines as they are the most popular for this route.

What is the cheapest day to fly round-trip from Ottawa to Washington, D.C. Dulles Intl Airport?

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

The best pricing can be found in the month of March. Prices to Washington, D.C. Dulles Intl Airport from Ottawa average $348. You can even find prices in March for less than $348, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $156. The month of October appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from Ottawa. Flying in the targeted month can save you up to 28%.

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.

$171+ Flights from Ottawa to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Ottawa to Washington, D.C. Dulles Intl are usually found in April or July, booked 59 days in advance, depart on a Wednesday or Saturday and return on a Saturday

Cheap flight deals from Ottawa to Dulles Intl

Round-trip from	$290 (Booking.com)
One-way from	$171 (Trip.com)
Popular in	December
Cheapest in	April
Average price	$324
Good round-trip deal	$347 or less
Good one-way deal	$324 or less

From Ottawa to Washington, D.C. Dulles Intl

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

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Highest demand for flights based on searches. 9% potential increase in price ($38 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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

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

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Find 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 September 1, 2025.

Wed 10/152:40 pmYOW - IAD

1 stop6h 25mAir Canada

Wed 10/229:35 amIAD - YOW

1 stop4h 16mAir Canada

Deal found 8/31

$290

Thu 10/28:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Mon 10/611:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/29

$293

Tue 9/238:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Thu 9/254:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/31

$294

Wed 10/296:50 amYOW - IAD

1 stop3h 39mPorter Airlines

Thu 10/306:35 pmIAD - YOW

1 stop3h 54mPorter Airlines

Deal found 8/30

$316

Wed 9/2411:00 amYOW - IAD

1 stop4h 06mPorter Airlines

Tue 9/304:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/29

$319

Mon 9/229:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Thu 9/2511:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$320

Wed 10/158:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Wed 10/224:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/31

$323

Mon 9/297:00 amYOW - IAD

1 stop3h 16mPorter Airlines

Mon 10/1311:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$326

Tue 10/711:00 amYOW - IAD

1 stop4h 06mPorter Airlines

Thu 10/911:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$331

Tue 10/711:00 amYOW - IAD

1 stop4h 06mPorter Airlines

Fri 10/104:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/30

$333

Tue 9/235:15 amYOW - IAD

1 stop4h 23mUnited Airlines

Tue 9/231:00 pmIAD - YOW

2 stops9h 05mUnited Airlines

Deal found 8/31

$359

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 September 1, 2025.

Wed 10/152:40 pmYOW - IAD

1 stop6h 25mAir Canada

Wed 10/229:35 amIAD - YOW

1 stop4h 16mAir Canada

Deal found 8/31

$290

Thu 10/28:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Mon 10/611:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/29

$293

Sat 10/259:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Mon 10/2711:40 amIAD - YOW

1 stop3h 24mPorter Airlines

Deal found 8/30

$294

Tue 9/238:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Thu 9/254:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/31

$294

Sat 10/49:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Sun 10/124:20 pmIAD - YOW

1 stop3h 39mPorter Airlines

Deal found 8/31

$294

Wed 10/296:50 amYOW - IAD

1 stop3h 39mPorter Airlines

Thu 10/306:35 pmIAD - YOW

1 stop3h 54mPorter Airlines

Deal found 8/30

$316

Wed 9/2411:00 amYOW - IAD

1 stop4h 06mPorter Airlines

Tue 9/304:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/29

$319

Mon 9/229:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Thu 9/2511:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$320

Sun 9/287:00 amYOW - IAD

1 stop3h 16mPorter Airlines

Sun 10/511:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/31

$320

Wed 10/158:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Wed 10/224:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/31

$323

Mon 9/297:00 amYOW - IAD

1 stop3h 16mPorter Airlines

Mon 10/1311:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$326

Last-minute flights from Ottawa to Dulles Intl
Discover last-minute flight deals from Ottawa to Dulles Intl. Data last updated September 1, 2025 and is based on user searches.

Sat 9/208:35 amYOW - IAD

1 stop5h 03mAir Canada

Sat 9/2710:20 amIAD - YOW

1 stop4h 44mAir Canada

Deal found 8/30

$364

Mon 9/229:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Thu 9/2511:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$320

Tue 9/238:35 amYOW - IAD

1 stop6h 31mPorter Airlines

Thu 9/254:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/31

$294

Tue 9/235:15 amYOW - IAD

1 stop4h 23mUnited Airlines

Tue 9/231:00 pmIAD - YOW

2 stops9h 05mUnited Airlines

Deal found 8/31

$359

Tue 9/2311:00 amYOW - IAD

1 stop4h 06mMultiple Airlines

Thu 9/251:55 pmIAD - YOW

2 stops25h 01mMultiple Airlines

Deal found 8/31

$377

Wed 9/2411:00 amYOW - IAD

1 stop4h 06mPorter Airlines

Tue 9/304:20 pmIAD - YOW

1 stop4h 14mPorter Airlines

Deal found 8/29

$319

Wed 9/247:29 pmYOW - IAD

Nonstop1h 43mUnited Airlines

Tue 9/306:15 amIAD - YOW

1 stop5h 30mUnited Airlines

Deal found 8/29

$368

Sat 9/279:35 amYOW - IAD

1 stop5h 31mMultiple Airlines

Sat 10/47:14 pmIAD - YOW

2 stops22h 06mMultiple Airlines

Deal found 8/30

$382

Sun 9/287:00 amYOW - IAD

1 stop3h 16mMultiple Airlines

Sun 10/57:14 pmIAD - YOW

2 stops53h 08mMultiple Airlines

Deal found 8/31

$388

Mon 9/297:00 amYOW - IAD

1 stop3h 16mPorter Airlines

Mon 10/1311:35 amIAD - YOW

1 stop4h 59mPorter Airlines

Deal found 8/30

$326

Mon 9/297:00 amYOW - IAD

1 stop8h 06mPorter Airlines

Sun 10/511:35 amIAD - YOW

1 stop6h 34mPorter Airlines

Deal found 8/31

$369

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 September 1, 2025.

Sat 10/49:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Deal found 8/29

$171

Tue 10/79:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Deal found 8/30

$172

Mon 9/297:00 amYOW - IAD

1 stop3h 16mPorter Airlines

Deal found 8/30

$178

Fri 9/2611:00 amYOW - IAD

1 stop4h 06mPorter Airlines

Deal found 8/30

$183

Wed 10/19:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Deal found 8/30

$189

Tue 9/235:55 amYOW - IAD

1 stop9h 11mMultiple Airlines

Deal found 8/31

$195

Sat 10/45:55 amYOW - IAD

2 stops12h 34mMultiple Airlines

Deal found 8/29

$224

Sat 10/47:29 pmYOW - IAD

Nonstop1h 43mAir Canada

Deal found 8/29

$231

Sat 9/272:45 pmYOW - IAD

Nonstop1h 43mAir Canada

Deal found 8/30

$232

Tue 9/237:29 pmYOW - IAD

Nonstop1h 43mAir Canada

Deal found 8/31

$239

Sun 10/57:00 amYOW - IAD

2 stops11h 14mMultiple Airlines

Deal found 8/29

$258

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

Wed 10/15

2:40 pm-9:05 pm

1 stop6h 25m

Washington, D.C. Dulles Intl

Wed 10/22

9:35 am-1:51 pm

1 stop4h 16m

$290

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/2

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Mon 10/6

11:35 am-4:34 pm

1 stop4h 59m

$293

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 10/25

9:35 am-3:06 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Mon 10/27

11:40 am-3:04 pm

1 stop3h 24m

$294

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 9/23

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Thu 9/25

4:20 pm-8:34 pm

1 stop4h 14m

$294

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 10/4

9:35 am-3:06 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Sun 10/12

4:20 pm-7:59 pm

1 stop3h 39m

$294

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 10/29

6:50 am-10:29 am

1 stop3h 39m

Washington, D.C. Dulles Intl

Thu 10/30

6:35 pm-10:29 pm

1 stop3h 54m

$316

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 9/24

11:00 am-3:06 pm

1 stop4h 06m

Washington, D.C. Dulles Intl

Tue 9/30

4:20 pm-8:34 pm

1 stop4h 14m

$319

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 9/22

9:35 am-3:06 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Thu 9/25

11:35 am-4:34 pm

1 stop4h 59m

$320

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 9/28

7:00 am-10:16 am

1 stop3h 16m

Washington, D.C. Dulles Intl

Sun 10/5

11:35 am-4:34 pm

1 stop4h 59m

$320

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 10/15

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Wed 10/22

4:20 pm-8:34 pm

1 stop4h 14m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/29

Showing 1-10 of 23 results

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, August is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of $296). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 17% on airfare.

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

354 reviews

Reviews

1 / 20

10.0

Excellent

Vincent Bryan,Aug 2025

YWG - YYZ

I'm satisfied with everything. It would have been perfect if the price were lower!

Porter Airlines

8.0

Very good

354 reviews

Porter Airlines

8.0

Very good

354 reviews

Reviews

1 / 20

10.0

Excellent

Vincent Bryan,Aug 2025

YWG - YYZ

I'm satisfied with everything. It would have been perfect if the price were lower!

United Airlines

7.4

Good

8,936 reviews

Porter Airlines

8.0

Very good

354 reviews

Reviews

1 / 20

10.0

Excellent

Vincent Bryan,Aug 2025

YWG - YYZ

I'm satisfied with everything. It would have been perfect if the price were lower!

Air Canada

7.1

Good

10,000 reviews

Porter Airlines

8.0

Very good

354 reviews

Reviews

1 / 20

10.0

Excellent

Vincent Bryan,Aug 2025

YWG - YYZ

I'm satisfied with everything. It would have been perfect if the price were lower!

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?
Air Canada and Porter Airlines can get you from Ottawa to Washington, D.C. Dulles Intl Airport in just under 6h 25m. Your travel time can differ by up to 06m. Ottawa and Washington, D.C. Dulles Intl Airport are separated by a distance of 449 mi. Both multi-stop and nonstop flights can be found to your destination and back.
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 Air Canada and United Airlines. These flights start at 47% 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 GoJet (59%), Air Canada (59%) or United Airlines (59%) 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 $570 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $194 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $293.
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, August is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of $296). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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%
Air Canada	Cheapest$280	Average$446	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$281	Average$443	FlexibilityNo cancel fee	On-time69%

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$171+ 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 10/4. 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

1. Tell us where you want to go

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 59 days in advance, depart on a Wednesday or Saturday and return on a Saturday

Cheap flight deals from Ottawa to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 September 1, 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 September 1, 2025.

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.

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.

Cheapflights Insights

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

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

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

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

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?

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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 September 1, 2025.