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

Porter Airlines, at $256, 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 Austrian Airlines. These flights start at 30% lower than the current average price 3 months from now.

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

The cheapest airlines for a one-way flight from Ottawa to Washington, D.C. Dulles Intl Airport are Porter Airlines ($139), United Airlines ($163), and Air Canada ($165).

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 Wednesday 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.

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

On average you can expect to pay $467 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $199 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $248.

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

Consider Avianca (75%), GoJet (71%) or Air Canada (71%) 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 $351. You can even find prices in March for less than $351, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $157. 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 17%.

Most accurate provider : When it comes to deals on Ottawa-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 Ottawa-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >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.

$139+ Flights from Ottawa to Washington, D.C. Dulles Intl Airport

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from Ottawa to Washington, D.C. Dulles Intl are usually found in April or March, booked 45 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Ottawa to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$256 (Trip.com)
One-way from	$139 (Kiwi.com)
Popular in	December
Cheapest in	April
Average price	$355
Good round-trip deal	$392 or less
Good one-way deal	$320 or less

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

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

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From Ottawa to Washington, D.C. Dulles Intl

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

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($50 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in May 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 mayo 28, 2025.

mar. 7/229:35 amYOW - IAD

1 stop5h 21mPorter Airlines

mié. 7/234:10 pmIAD - YOW

1 stop3h 28mPorter Airlines

Deal found 5/27

$256

mié. 9/249:50 amYOW - IAD

Nonstop1h 43mAir Canada

dom. 9/288:16 amIAD - YOW

Nonstop1h 42mAir Canada

Deal found 5/27

$258

jue. 6/195:15 amYOW - IAD

1 stop4h 22mAustrian Airlines

dom. 6/228:18 amIAD - YOW

Nonstop1h 40mAustrian Airlines

Deal found 5/28

$272

lun. 6/97:29 pmYOW - IAD

Nonstop1h 35mUnited Airlines

mar. 6/109:00 amIAD - YOW

2 stops8h 04mUnited Airlines

Deal found 5/28

$280

lun. 6/97:29 pmYOW - IAD

Nonstop1h 35mMultiple Airlines

mar. 6/109:00 amIAD - YOW

1 stop13h 09mMultiple Airlines

Deal found 5/28

$309

jue. 11/134:20 pmYOW - IAD

2 stops19h 37mDelta

mié. 3/117:50 pmIAD - YOW

2 stops19h 26mDelta

Deal found 5/27

$666

mar. 11/115:55 amYOW - IAD

2 stops10h 36mWestJet

mar. 3/107:00 amIAD - YOW

2 stops13h 50mWestJet

Deal found 5/27

$712

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 mayo 28, 2025.

mar. 7/229:35 amYOW - IAD

1 stop5h 21mPorter Airlines

mié. 7/234:10 pmIAD - YOW

1 stop3h 28mPorter Airlines

Deal found 5/27

$256

mié. 9/249:50 amYOW - IAD

Nonstop1h 43mAir Canada

dom. 9/288:16 amIAD - YOW

Nonstop1h 42mAir Canada

Deal found 5/27

$258

jue. 6/195:15 amYOW - IAD

1 stop4h 22mAustrian Airlines

dom. 6/228:18 amIAD - YOW

Nonstop1h 40mAustrian Airlines

Deal found 5/28

$272

lun. 6/97:29 pmYOW - IAD

Nonstop1h 35mUnited Airlines

mar. 6/109:00 amIAD - YOW

2 stops8h 04mUnited Airlines

Deal found 5/28

$280

lun. 6/97:29 pmYOW - IAD

Nonstop1h 35mMultiple Airlines

mar. 6/109:00 amIAD - YOW

1 stop13h 09mMultiple Airlines

Deal found 5/28

$309

mar. 10/215:55 amYOW - IAD

2 stops17h 05mWestJet

sáb. 10/253:00 pmIAD - YOW

2 stops9h 22mWestJet

Deal found 5/28

$581

jue. 11/134:20 pmYOW - IAD

2 stops19h 37mDelta

mié. 3/117:50 pmIAD - YOW

2 stops19h 26mDelta

Deal found 5/27

$666

Last-minute flights from Ottawa to Dulles Intl
Discover last-minute flight deals from Ottawa to Dulles Intl. Data last updated mayo 28, 2025 and is based on user searches.

lun. 6/25:55 amYOW - IAD

2 stops16h 59mWestJet

vie. 6/63:37 pmIAD - YOW

2 stops8h 45mWestJet

Deal found 5/27

$808

mar. 6/37:29 pmYOW - IAD

Nonstop1h 35mAir Canada

jue. 7/38:18 amIAD - YOW

Nonstop1h 40mAir Canada

Deal found 5/27

$382

mar. 6/36:12 amYOW - IAD

2 stops10h 06mUnited Airlines

jue. 7/310:18 pmIAD - YOW

2 stops18h 47mUnited Airlines

Deal found 5/27

$680

jue. 6/58:35 amYOW - IAD

1 stop6h 31mPorter Airlines

lun. 6/94:20 pmIAD - YOW

1 stop4h 43mPorter Airlines

Deal found 5/28

$330

jue. 6/54:25 pmYOW - IAD

2 stops21h 58mMultiple Airlines

dom. 6/811:35 amIAD - YOW

1 stop4h 58mMultiple Airlines

Deal found 5/27

$493

lun. 6/97:29 pmYOW - IAD

Nonstop1h 35mUnited Airlines

mar. 6/109:00 amIAD - YOW

2 stops8h 04mUnited Airlines

Deal found 5/28

$280

lun. 6/97:29 pmYOW - IAD

Nonstop1h 35mMultiple Airlines

mar. 6/109:00 amIAD - YOW

1 stop13h 09mMultiple Airlines

Deal found 5/28

$309

jue. 6/1910:15 amYOW - IAD

1 stop4h 51mPorter Airlines

dom. 6/224:20 pmIAD - YOW

1 stop4h 18mPorter Airlines

Deal found 5/27

$260

jue. 6/197:29 pmYOW - IAD

Nonstop1h 35mAir Canada

dom. 6/228:18 amIAD - YOW

Nonstop1h 40mAir Canada

Deal found 5/28

$264

jue. 6/195:15 amYOW - IAD

1 stop4h 22mAustrian Airlines

dom. 6/228:18 amIAD - YOW

Nonstop1h 40mAustrian Airlines

Deal found 5/28

$272

jue. 6/195:55 amYOW - IAD

2 stops10h 49mDelta

dom. 6/229:40 amIAD - YOW

2 stops14h 42mDelta

Deal found 5/28

$1,223

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 mayo 28, 2025.

jue. 6/197:00 amYOW - IAD

1 stop3h 16mPorter Airlines

Deal found 5/28

$139

sáb. 7/267:29 pmYOW - IAD

Nonstop1h 35mUnited Airlines

Deal found 5/28

$163

vie. 8/292:25 pmYOW - IAD

1 stop6h 36mAir Canada

Deal found 5/28

$165

vie. 8/292:45 pmYOW - IAD

Nonstop1h 43mLufthansa

Deal found 5/28

$191

jue. 6/193:50 pmYOW - IAD

2 stops22h 33mMultiple Airlines

Deal found 5/28

$227

dom. 7/65:55 amYOW - IAD

2 stops10h 49mWestJet

Deal found 5/26

$590

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

mar. 7/22

9:35 am-2:56 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

mié. 7/23

4:10 pm-7:38 pm

1 stop3h 28m

$256

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

mié. 9/24

9:50 am-11:33 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

dom. 9/28

8:16 am-9:58 am

Nonstop1h 42m

$258

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 6/19

5:15 am-9:37 am

1 stop4h 22m

Washington, D.C. Dulles Intl

dom. 6/22

8:18 am-9:58 am

Nonstop1h 40m

$272

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

lun. 6/9

7:29 pm-9:04 pm

Nonstop1h 35m

Washington, D.C. Dulles Intl

mar. 6/10

9:00 am-5:04 pm

2 stops8h 04m

$280

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

lun. 6/9

7:29 pm-9:04 pm

Nonstop1h 35m

Washington, D.C. Dulles Intl

mar. 6/10

9:00 am-10:09 pm

1 stop13h 09m

$309

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

mar. 10/21

5:55 am-11:00 pm

2 stops17h 05m

Washington, D.C. Dulles Intl

sáb. 10/25

3:00 pm-12:22 am

2 stops9h 22m

$581

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 11/13

4:20 pm-11:57 am

2 stops19h 37m

Washington, D.C. Dulles Intl

mié. 3/11

7:50 pm-3:16 pm

2 stops19h 26m

$666

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 6/19

7:00 am-10:16 am

1 stop3h 16m

$139

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

sáb. 7/26

7:29 pm-9:04 pm

Nonstop1h 35m

$163

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

vie. 8/29

2:25 pm-9:01 pm

1 stop6h 36m

$165

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/28

Showing 1-10 of 13 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 May.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	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 Ottawa-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 Ottawa-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >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

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 45 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 $309). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $358). 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 afternoon could potentially save you up to 16% on airfare.

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).

Rainfall in Dulles Intl 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

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

Read reviews from past customers who have flown Porter Airlines, Delta and Austrian Airlines from Ottawa to Washington, D.C.. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

286 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Porter Airlines

8.0

Very good

286 reviews

Porter Airlines

8.0

Very good

286 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Delta

8.0

Very good

7,957 reviews

Porter Airlines

8.0

Very good

286 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Austrian Airlines

7.6

Good

797 reviews

Porter Airlines

8.0

Very good

286 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

United Airlines

7.4

Good

8,756 reviews

Porter Airlines

8.0

Very good

286 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

WestJet

7.2

Good

2,860 reviews

Porter Airlines

8.0

Very good

286 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

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.
What are the cheapest airlines flying from Ottawa to Washington, D.C. Dulles Intl Airport round-trip?
Porter Airlines, at $256, 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 Austrian Airlines. These flights start at 30% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Ottawa to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airlines for a one-way flight from Ottawa to Washington, D.C. Dulles Intl Airport are Porter Airlines ($139), United Airlines ($163), and Air Canada ($165).
What are the most reliable airlines from Ottawa to Washington, D.C. Dulles Intl Airport?
Consider Avianca (75%), GoJet (71%) or Air Canada (71%) 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 $467 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $199 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $248.
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 $309). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $358). 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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Silver Spring

Fairfax

Fredericksburg

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Gaithersburg

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Laurel

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Rockville

Springfield

National Harbor

Reston

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ottawa to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	Cheapest$197	Average$373	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$240	Average$465	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$277	Average$496	FlexibilityNo cancel fee	On-time67%

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$139+ 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 6/19. 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 March, booked 45 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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

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 mayo 28, 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 mayo 28, 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.

Compare providers for flights from Ottawa 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 Ottawa to Dulles Intl in May.

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?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Dulles Intl. Price data was last updated on May 23, 2025.

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?

Find hourly flight availability from Ottawa 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 mayo 28, 2025.

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

Explore weekly flight availability from Ottawa to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated mayo 28, 2025.

Rainfall in Dulles Intl by month

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

Temperature in Dulles Intl by month

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

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown Porter Airlines, Delta and Austrian Airlines from Ottawa to Washington, D.C.. In addition to providing an overall rating, 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?

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

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

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 mayo 28, 2025.