£156 Cheap Flights from Ottawa (YOW) to Washington (IAD)

View £156 flight on Fri, 3 Jul 2026Opens in a new window

Flight 1

Popular airlines from Ottawa International Airport (YOW) to Washington Dulles International Airport (IAD)

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Cheap Flights from Ottawa (YOW) to Washington (IAD)

Prices were available within the past 7 days and start at £156 for one-way flights and £276 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Porter Airlines
Mon, 13 Jul - Fri, 17 Jul
YOW
Ottawa
IAD
Washington
£276 Return, found 4 days ago
£276
Return
found 4 days ago
Select Porter Airlines flight, departing Mon, 13 Jul from Ottawa to Washington, returning Fri, 17 Jul, priced at £276 found 4 days ago
Air Canada
Mon, 13 Jul - Fri, 17 Jul
YOW
Ottawa
IAD
Washington
£280 Return, found 4 days ago
£280
Return
found 4 days ago
Select Air Canada flight, departing Mon, 13 Jul from Ottawa to Washington, returning Fri, 17 Jul, priced at £280 found 4 days ago
Air Canada
Fri, 3 Jul - Mon, 6 Jul
YOW
Ottawa
IAD
Washington
£283 Return, found 4 days ago
£283
Return
found 4 days ago
Select Air Canada flight, departing Fri, 3 Jul from Ottawa to Washington, returning Mon, 6 Jul, priced at £283 found 4 days ago
Porter Airlines
Thu, 11 Jun - Thu, 18 Jun
YOW
Ottawa
IAD
Washington
£284 Return, found 4 days ago
£284
Return
found 4 days ago
Select Porter Airlines flight, departing Thu, 11 Jun from Ottawa to Washington, returning Thu, 18 Jun, priced at £284 found 4 days ago
Air Canada
Fri, 3 Jul - Mon, 6 Jul
YOW
Ottawa
IAD
Washington
£285 Return, found 4 days ago
£285
Return
found 4 days ago
Select Air Canada flight, departing Fri, 3 Jul from Ottawa to Washington, returning Mon, 6 Jul, priced at £285 found 4 days ago
Air Canada
Fri, 3 Jul - Mon, 6 Jul
YOW
Ottawa
IAD
Washington
£286 Return, found 4 days ago
£286
Return
found 4 days ago
Select Air Canada flight, departing Fri, 3 Jul from Ottawa to Washington, returning Mon, 6 Jul, priced at £286 found 4 days ago
Air Canada
Fri, 3 Jul - Mon, 6 Jul
YOW
Ottawa
IAD
Washington
£289 Return, found 4 days ago
£289
Return
found 4 days ago
Select Air Canada flight, departing Fri, 3 Jul from Ottawa to Washington, returning Mon, 6 Jul, priced at £289 found 4 days ago
Air Canada
Fri, 12 Jun - Tue, 16 Jun
YOW
Ottawa
IAD
Washington
£291 Return, found 3 days ago
£291
Return
found 3 days ago
Select Air Canada flight, departing Fri, 12 Jun from Ottawa to Washington, returning Tue, 16 Jun, priced at £291 found 3 days ago
Air Canada
Wed, 17 Jun - Wed, 24 Jun
YOW
Ottawa
IAD
Washington
£292 Return, found 4 days ago
£292
Return
found 4 days ago
Select Air Canada flight, departing Wed, 17 Jun from Ottawa to Washington, returning Wed, 24 Jun, priced at £292 found 4 days ago
WestJet
Sat, 16 May - Fri, 22 May
YOW
Ottawa
IAD
Washington
£851 Return, found 10 hours ago
£851
Return
found 10 hours ago
Select WestJet flight, departing Sat, 16 May from Ottawa to Washington, returning Fri, 22 May, priced at £851 found 10 hours ago

Frequently asked questions

How much does a flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
One-way flights typically cost between £374 and £1,053 and return flights often range between £566 and £1,894. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
September is typically the cheapest month to fly from Ottawa Macdonald-Cartier International Airport (YOW) to Washington Dulles International Airport (IAD), with average return fares of approximately £515. This is about 18% lower than the average price throughout the year. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from Ottawa Macdonald-Cartier International Airport (YOW) to Washington Dulles International Airport (IAD) include February and April.
Which airlines fly direct from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter YOW to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, AC typically offers the lowest fares. AC offers the most daily flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Based on booking data from the past year, the cheapest months to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are typically September and February, with average prices around £515 for a return flight. However, the most popular months for this route are November and June, which means you'll find plenty of flight options during those times. If you're looking for the best balance of value and availability, consider flying in September or February for lower fares, or in November or June if having a wide selection of flights is your top priority.
How many flights per day from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 4 nonstop flights per day from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.). For even more choice, look at flights that include layovers, as there are around 32 connecting flights per day. Some common connection points include Pearson Intl. (YYZ), Pierre Elliott Trudeau Intl. (YUL), and Liberty Intl. (EWR).
What is the earliest flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs at approximately 5:00 AM local time. This flight is operated by Air Canada. This is a seasonal service active in February and March. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you're flying from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.), you'll typically find the most flights on a Thursday, with around 32 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include AC, UA, and PD. Flight schedules are fairly consistent throughout the week, with Thursday offering only slightly more flights than other weekdays.
What are the most popular departure times for flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are in the morning, from 9am to 12pm. About 27% of passengers prefer this time. Air Canada and United Airlines offer flights during this window. This timing works well for many travelers as it allows for a productive morning before flying, and an afternoon arrival at your destination.
How long does it take to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from YOW to IAD typically takes around 1 hour 50 minutes, covering approximately 449 miles. Connecting flights on this route usually add 3 hours 40 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for YOW to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A direct, return business class ticket from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically costs between £1,133 - £1,526. You may also be able to find a cheaper business class journey between Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) if you opt for a connecting flight.
How do I earn miles on a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Macdonald-Cartier Intl. (YOW)?
When traveling from Macdonald-Cartier Intl. (YOW) to Washington, you can fly into Ronald Reagan Washington National (DCA) and Washington Dulles Intl. (IAD). Some flights may connect through major hubs like Pearson Intl. (YYZ), Billy Bishop Toronto City (YTZ), Liberty Intl. (EWR) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Macdonald-Cartier Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada
Return price
£276
Distance
719 km
Average flight time
1 hour 49 mins

Book with confidence

Compare flights from Ottawa to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Ottawa to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Macdonald-Cartier Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Macdonald-Cartier Intl. (YOW) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Ottawa to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Macdonald-Cartier Intl. to Washington Dulles Intl. start at just £276 and range up to £851.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Ottawa and Washington
  • booking your flight during July, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Ottawa to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Macdonald-Cartier Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Ottawa to Washington easily and book with confidence

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