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

Porter Airlines, at $280, 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 WestJet. These flights start at 23% 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 ($159), Air Canada ($171), and WestJet ($230).

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 Thursday evenings when fares are most often at their lowest. Monday at noon 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 $535 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $181 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $280.

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

Consider Avianca (82%), GoJet (72%) or Air Canada (72%) 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 $357. You can even find prices in March for less than $357, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $157. The month of June 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 21%.

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 5 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.

$159+ Flights from Ottawa to Washington, D.C. Dulles Intl Airport

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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.

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Cheapflights Tip: The best prices from Ottawa to Washington, D.C. Dulles Intl are usually found in June or March, booked 45 days in advance, depart on a Wednesday or Saturday 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	$280 (Trip.com)
One-way from	$159 (Kiwi.com)
Popular in	December
Cheapest in	June
Average price	$324
Good round-trip deal	$564 or less
Good one-way deal	$225 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

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Highest demand for flights based on searches. 12% potential increase in price ($52 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 April 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 abril 15, 2025.

jue. 5/87:00 amYOW - IAD

1 stop3h 16mPorter Airlines

sáb. 5/104:20 pmIAD - YOW

1 stop3h 33mPorter Airlines

Deal found 4/14

$280

jue. 6/57:29 pmYOW - IAD

Nonstop1h 35mAir Canada

sáb. 6/71:00 pmIAD - YOW

Nonstop1h 42mAir Canada

Deal found 4/14

$294

lun. 5/127:00 amYOW - IAD

2 stops9h 36mMultiple Airlines

mié. 5/144:20 pmIAD - YOW

1 stop8h 02mMultiple Airlines

Deal found 4/14

$351

jue. 6/55:55 amYOW - IAD

2 stops16h 59mWestJet

sáb. 6/76:00 amIAD - YOW

2 stops18h 22mWestJet

Deal found 4/14

$449

jue. 5/87:29 pmYOW - IAD

Nonstop1h 44mUnited Airlines

sáb. 5/105:10 pmIAD - YOW

Nonstop1h 42mUnited Airlines

Deal found 4/14

$539

jue. 5/295:55 amYOW - IAD

2 stops10h 49mDelta

jue. 6/59:40 amIAD - YOW

2 stops14h 42mDelta

Deal found 4/14

$815

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 abril 15, 2025.

jue. 5/810:15 amYOW - IAD

1 stop4h 51mPorter Airlines

dom. 5/114:20 pmIAD - YOW

1 stop4h 18mPorter Airlines

Deal found 4/14

$280

jue. 6/57:29 pmYOW - IAD

Nonstop1h 35mAir Canada

sáb. 6/71:00 pmIAD - YOW

Nonstop1h 42mAir Canada

Deal found 4/14

$294

lun. 5/127:00 amYOW - IAD

2 stops9h 36mMultiple Airlines

mié. 5/144:20 pmIAD - YOW

1 stop8h 02mMultiple Airlines

Deal found 4/14

$351

jue. 6/55:55 amYOW - IAD

2 stops16h 59mWestJet

sáb. 6/76:00 amIAD - YOW

2 stops18h 22mWestJet

Deal found 4/14

$449

jue. 5/87:29 pmYOW - IAD

Nonstop1h 44mUnited Airlines

sáb. 5/105:10 pmIAD - YOW

Nonstop1h 42mUnited Airlines

Deal found 4/14

$539

jue. 5/295:55 amYOW - IAD

2 stops10h 49mDelta

jue. 6/59:40 amIAD - YOW

2 stops14h 42mDelta

Deal found 4/14

$815

Last-minute flights from Ottawa to Dulles Intl
Discover last-minute flight deals from Ottawa to Dulles Intl. Data last updated abril 15, 2025 and is based on user searches.

dom. 4/205:55 amYOW - IAD

2 stops10h 48mDelta

jue. 4/246:00 amIAD - YOW

2 stops18h 09mDelta

Deal found 4/14

$1,539

lun. 4/217:29 pmYOW - IAD

Nonstop1h 46mAir Canada

sáb. 4/268:25 amIAD - YOW

1 stop4h 59mAir Canada

Deal found 4/14

$407

lun. 4/215:45 pmYOW - IAD

1 stop4h 39mMultiple Airlines

sáb. 4/269:08 amIAD - YOW

2 stops15h 32mMultiple Airlines

Deal found 4/14

$498

mar. 4/228:50 amYOW - IAD

1 stop4h 09mPorter Airlines

dom. 4/277:00 amIAD - YOW

1 stop4h 54mPorter Airlines

Deal found 4/14

$385

jue. 5/87:00 amYOW - IAD

1 stop3h 16mPorter Airlines

sáb. 5/104:20 pmIAD - YOW

1 stop3h 33mPorter Airlines

Deal found 4/14

$280

jue. 5/87:29 pmYOW - IAD

Nonstop1h 44mUnited Airlines

sáb. 5/105:10 pmIAD - YOW

Nonstop1h 42mUnited Airlines

Deal found 4/14

$539

lun. 5/127:00 amYOW - IAD

2 stops9h 36mMultiple Airlines

mié. 5/144:20 pmIAD - YOW

1 stop8h 02mMultiple Airlines

Deal found 4/14

$351

mié. 5/142:45 pmYOW - IAD

Nonstop1h 44mAir Canada

mié. 5/218:17 amIAD - YOW

Nonstop1h 41mAir Canada

Deal found 4/14

$299

jue. 5/295:55 amYOW - IAD

2 stops10h 49mDelta

jue. 6/59:40 amIAD - YOW

2 stops14h 42mDelta

Deal found 4/14

$815

vie. 5/306:00 amYOW - IAD

1 stop11h 54mWestJet

lun. 6/26:45 pmIAD - YOW

2 stops21h 35mWestJet

Deal found 4/14

$619

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 abril 15, 2025.

dom. 5/259:35 amYOW - IAD

1 stop5h 31mPorter Airlines

Deal found 4/13

$159

mié. 5/287:29 pmYOW - IAD

Nonstop1h 35mAir Canada

Deal found 4/15

$171

vie. 5/235:55 amYOW - IAD

2 stops32h 44mMultiple Airlines

Deal found 4/14

$227

jue. 5/225:15 pmYOW - IAD

2 stops24h 39mWestJet

Deal found 4/14

$230

mié. 5/286:12 amYOW - IAD

2 stops14h 34mUnited Airlines

Deal found 4/15

$282

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

jue. 5/8

7:00 am-10:16 am

1 stop3h 16m

Washington, D.C. Dulles Intl

sáb. 5/10

4:20 pm-7:53 pm

1 stop3h 33m

$280

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 6/5

7:29 pm-9:04 pm

Nonstop1h 35m

Washington, D.C. Dulles Intl

sáb. 6/7

1:00 pm-2:42 pm

Nonstop1h 42m

$294

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

lun. 5/12

7:00 am-4:36 pm

2 stops9h 36m

Washington, D.C. Dulles Intl

mié. 5/14

4:20 pm-12:22 am

1 stop8h 02m

$351

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 6/5

5:55 am-10:54 pm

2 stops16h 59m

Washington, D.C. Dulles Intl

sáb. 6/7

6:00 am-12:22 am

2 stops18h 22m

$449

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 5/8

5:15 am-9:39 am

1 stop4h 24m

Washington, D.C. Dulles Intl

jue. 5/8

10:19 pm-1:09 pm

2 stops14h 50m

$530

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 5/29

5:55 am-4:44 pm

2 stops10h 49m

Washington, D.C. Dulles Intl

jue. 6/5

9:40 am-12:22 am

2 stops14h 42m

$815

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

dom. 5/25

9:35 am-3:06 pm

1 stop5h 31m

$159

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

mié. 5/28

7:29 pm-9:04 pm

Nonstop1h 35m

$171

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

vie. 5/23

5:55 am-2:39 pm

2 stops32h 44m

$227

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

jue. 5/22

5:15 pm-5:54 pm

2 stops24h 39m

$230

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

Showing 1-10 of 12 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 April.

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 $383). 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 21% 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 Saturday, which is when the least amount of flights are scheduled (5 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 United 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

281 reviews

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?

Porter Airlines

8.0

Very good

281 reviews

Porter Airlines

8.0

Very good

281 reviews

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

Delta

8.0

Very good

7,918 reviews

Porter Airlines

8.0

Very good

281 reviews

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

United Airlines

7.4

Good

8,658 reviews

Porter Airlines

8.0

Very good

281 reviews

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

WestJet

7.2

Good

2,805 reviews

Porter Airlines

8.0

Very good

281 reviews

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

Air Canada

7.0

Good

9,127 reviews

Porter Airlines

8.0

Very good

281 reviews

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

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 5 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 $280, 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 WestJet. These flights start at 23% 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 ($159), Air Canada ($171), and WestJet ($230).
What are the most reliable airlines from Ottawa to Washington, D.C. Dulles Intl Airport?
Consider Avianca (82%), GoJet (72%) or Air Canada (72%) 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 $535 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $181 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $280.
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 $383). 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
United Airlines	Cheapest$240	Average$465	FlexibilityNo cancel fee	On-time69%
Porter Airlines	Cheapest$273	Average$373	FlexibilityNo cancel fee	On-time52%
Air Canada	Cheapest$277	Average$496	FlexibilityNo cancel fee	On-time67%

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$159+ 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 5/25. 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 June or March, booked 45 days in advance, depart on a Wednesday or Saturday 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 abril 15, 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 abril 15, 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 April.

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 April 11, 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 abril 15, 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 abril 15, 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 United 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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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 abril 15, 2025.