$194 Cheap Flights from Ottawa (YOW) to Washington (IAD)

View $194 flight on Fri, Dec 5, 2025Opens in a new window

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

Cheap Flights from Ottawa to Washington (YOW-IAD)

Prices were available within the past 7 days and start at $194 for one-way flights and $291 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Oct 22 - Thu, Oct 23
YOW
Ottawa
IAD
Washington
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 22 from Ottawa to Washington, returning Thu, Oct 23, priced at $291 found 1 day ago
United
Wed, Oct 22 - Thu, Oct 23
YOW
Ottawa
IAD
Washington
$332 Roundtrip, found 1 day ago
$332
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 22 from Ottawa to Washington, returning Thu, Oct 23, priced at $332 found 1 day ago
United
Fri, Oct 3 - Mon, Oct 6
YOW
Ottawa
IAD
Washington
$340 Roundtrip, found 18 hours ago
$340
Roundtrip
found 18 hours ago
Select United flight, departing Fri, Oct 3 from Ottawa to Washington, returning Mon, Oct 6, priced at $340 found 18 hours ago
United
Sun, Oct 26 - Thu, Oct 30
YOW
Ottawa
IAD
Washington
$345 Roundtrip, found 1 day ago
$345
Roundtrip
found 1 day ago
Select United flight, departing Sun, Oct 26 from Ottawa to Washington, returning Thu, Oct 30, priced at $345 found 1 day ago
Air Canada
Wed, Oct 22 - Thu, Oct 23
YOW
Ottawa
IAD
Washington
$346 Roundtrip, found 1 day ago
$346
Roundtrip
found 1 day ago
Select Air Canada flight, departing Wed, Oct 22 from Ottawa to Washington, returning Thu, Oct 23, priced at $346 found 1 day ago
United
Fri, Oct 3 - Mon, Oct 6
YOW
Ottawa
IAD
Washington
$349 Roundtrip, found 18 hours ago
$349
Roundtrip
found 18 hours ago
Select United flight, departing Fri, Oct 3 from Ottawa to Washington, returning Mon, Oct 6, priced at $349 found 18 hours ago
Porter Airlines
Thu, Nov 27 - Mon, Dec 1
YOW
Ottawa
IAD
Washington
$350 Roundtrip, found 6 hours ago
$350
Roundtrip
found 6 hours ago
Select Porter Airlines flight, departing Thu, Nov 27 from Ottawa to Washington, returning Mon, Dec 1, priced at $350 found 6 hours ago
Air Canada
Wed, Nov 26 - Sat, Nov 29
YOW
Ottawa
IAD
Washington
$351 Roundtrip, found 17 hours ago
$351
Roundtrip
found 17 hours ago
Select Air Canada flight, departing Wed, Nov 26 from Ottawa to Washington, returning Sat, Nov 29, priced at $351 found 17 hours ago
Air Canada
Fri, Oct 17 - Sun, Oct 19
YOW
Ottawa
IAD
Washington
$353 Roundtrip, found 3 days ago
$353
Roundtrip
found 3 days ago
Select Air Canada flight, departing Fri, Oct 17 from Ottawa to Washington, returning Sun, Oct 19, priced at $353 found 3 days ago
WestJet
Mon, Oct 20 - Fri, Oct 24
YOW
Ottawa
IAD
Washington
$984 Roundtrip, found 17 hours ago
$984
Roundtrip
found 17 hours ago
Select WestJet flight, departing Mon, Oct 20 from Ottawa to Washington, returning Fri, Oct 24, priced at $984 found 17 hours ago

Find the cheapest month to fly from Ottawa (YOW) to Washington (IAD)

May is typically the cheapest month to fly

From $220 - $495 per traveler.

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $506
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $506
Flights from Ottawa (YOW) to Washington (IAD)
Origin airport
Macdonald-Cartier Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, Porter Airlines, United, WestJet
Roundtrip price
$290
Distance
449 mi
Average flight time
1 hour 43 mins

Ottawa to Washington Flights

The cheapest times to fly from Ottawa to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ottawa to Washington are during the month of October. You can find some of the cheapest flights from Ottawa to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ottawa to Washington

Sunday is one of the best days to book for cheap flights from Ottawa to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ottawa to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ottawa to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $194 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ottawa to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ottawa to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $194 or cheap return flight from $291 from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
Traveling in October is a good way to save, as it's the cheapest month for flights between YOW and IAD. You'll often find the lowest fares during the off-season.
Which airlines fly direct from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
When setting off from Macdonald-Cartier Intl. Airport (YOW), you can take a nonstop flight to Washington Dulles Intl. Airport (IAD) with United Airlines.
What is the cheapest airline that flies from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest YOW to IAD flight.
How many flights per day from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
When flying out of Macdonald-Cartier Intl. Airport (YOW), you'll have a choice from an average of 2 daily direct flights to Washington Dulles Intl. Airport (IAD).
What are the most popular departure times for flights from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
Flights between YOW and IAD tend to be busiest at 2 PM. If you'd like a less crowded experience and potentially cheaper prices, look for a time outside the usual busy windows.
What day of the week has the most flights from YOW to IAD?
If you travel on a Friday, you'll get the widest range of options for flights from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
Take the earliest flight at around 9:45AM UTC-5, departing from Macdonald-Cartier Intl. Airport (YOW). You'll be flying for approximately 1h 53m, coming in to land at Washington Dulles Intl. Airport (IAD) at approximately 11:38AM UTC-5.
How long does it take to fly from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
Flights from YOW to IAD have an average travel time of 1 hour and 53 minutes. The total distance between the two is 450 mi.
What is the best time to fly from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
To avoid potential delays on the Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD) route, fly before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Macdonald-Cartier Intl. Airport (YOW)?
If you're departing on a direct flight from Macdonald-Cartier Intl. Airport (YOW) to Washington, you can touch down at either Washington Dulles Intl. Airport (IAD) or Ronald Reagan Washington National Airport (DCA).
Is it cheaper to buy a plane ticket from Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until just before your trip to book your flight from YOW to IAD often results in higher prices. While you might find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary for a better chance of snagging a bargain.
Is it cheaper to book a YOW to IAD flight and hotel package?
Booking a YOW to IAD flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our impressive range of accommodations 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 Macdonald-Cartier Intl. Airport (YOW) to Washington Dulles Intl. Airport (IAD)?
In most cases, you can modify or cancel your YOW to IAD flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you need further details, go to our Customer Service portal.

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*Available to One Key members.