Question 1

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

Accepted Answer

Departing from Ottawa to Washington, D.C. Dulles Intl Airport will take you 5h 31m. There are 723 km between Ottawa and Washington, D.C. Dulles Intl Airport.

Question 2

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

Accepted Answer

According to our current data, Porter Airlines (C$ 353), Air Canada (C$ 366), and United Airlines (C$ 451) offers the cheapest pricing from Ottawa to Washington, D.C. Dulles Intl Airport. These flights start at 31% lower than the current average price 3 months from now.

Question 3

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

Accepted Answer

The best time to book flights from Ottawa to Washington, D.C. Dulles Intl Airport is 58 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 4

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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.

Question 5

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

Accepted Answer

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

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Question 7

E

Accepted Answer

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Question 8

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

Accepted Answer

Looking at all options, your cheapest flight can be booked for C$ 297. While the most popular route (Ottawa - Washington, D.C. Dulles Intl) can be booked for C$ 403 on average our data indicates C$ 969 when flying from Ottawa to Washington, D.C. Dulles Intl Airport.

Question 9

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

Accepted Answer

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 Ottawa to Washington, D.C. Dulles Intl Airport on time: GoJet (59%), Air Canada (59%), United Airlines (59%).

Question 10

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

Accepted Answer

Air Canada, Porter Airlines and United Airlines are the most popular airlines when flying from Ottawa to Washington, D.C. Dulles Intl Airport.

Question 11

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

Accepted Answer

Users have found that leaving on a Thursday can be a cost-effective option. It’s possible to save up to 21% on your flight compared to booking on days when demand is much higher.

Question 12

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

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 59 days in advance, which can save you up to 243% on flights from Ottawa to Washington, D.C. Dulles Intl Airport compared to booking the week you need them. Waiting 59 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 522. For sooner than that we have options available in the next 3 days from C$ 855.

Question 13

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

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in October. For low rates, March can be a great choice for travel to Washington, D.C. Dulles Intl Airport. Flights to Washington, D.C. Dulles Intl Airport from Ottawa in March are about C$ 481 on average during March, but can be found for as low as C$ 216.

Question 14

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

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from Ottawa to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 61% on your trip compared to booking a flight at noon.

Question 15

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

Accepted Answer

Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Ottawa; the airport handles an average of 3 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Ottawa airport to Washington, D.C. Dulles Intl. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

How does Cheapflights help users find flights from Ottawa to Dulles Intl?

Accepted Answer

Cheapflights makes it easy to find Ottawa to Dulles Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Question 20

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Dulles Intl?

Accepted Answer

Cheapflights helps you find that perfect flight to Dulles Intl from Ottawa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 21

Can Cheapflights find flights from Ottawa to Dulles Intl with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from Ottawa to Dulles Intl with no change fees.

Question 22

Can Cheapflights notify me if prices for flights from Ottawa to Dulles Intl become cheaper?

Accepted Answer

Yes! Start tracking prices for Ottawa to Dulles Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	C$ 403
One-way from	C$ 238
Popular in	December
Cheapest in	April
Average price	C$ 557
Good round-trip deal	C$ 705 or less
Good one-way deal	C$ 364 or less

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	CheapestC$ 353	AverageC$ 440	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Air Canada	CheapestC$ 366	AverageC$ 571	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 451	AverageC$ 667	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Cheap flights from Ottawa to Washington, D.C. Dulles Intl Airport from C$ 238

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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.

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 Friday or Tuesday and return on a Wednesday

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 18 August 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 18 August 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?

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 8 August 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 18 August 2025.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Porter Airlines,United Airlines, andAir Canada from Ottawa to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

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

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

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

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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ottawa to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Ottawa to Dulles Intl

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to Dulles Intl?

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Dulles Intl?

Can Cheapflights find flights from Ottawa to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Ottawa to Dulles Intl become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 18 August 2025.