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Ottawa

$140+ Cheap flights from Washington, D.C. (WAS) to Ottawa (YOW)

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
Sep 6 — Sep 131
Sun 9/6
Sun 9/13
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. to Ottawa are usually found in October or August, booked 67 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Washington, D.C. to Ottawa

Cheapest flights from Washington, D.C. to Ottawa
Explore the most affordable flight options available from Washington, D.C. to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2026.

This flugladen.de deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:05 pm -
1 stop5h 47m
Sun 9/1310:40 am -
1 stop4h 30m
Deal found 8/7$315
This Trip.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:50 pm -
1 stop3h 24m
Mon 8/3110:40 am -
1 stop4h 30m
Deal found 8/6$319
This Trip.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/273:50 pm -
1 stop4h 14m
Mon 8/3110:40 am -
1 stop4h 30m
Deal found 8/6$320
This Trip.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/283:50 pm -
1 stop4h 14m
Tue 9/110:40 am -
1 stop4h 30m
Deal found 8/5$321
This Trip.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:50 pm -
1 stop4h 12m
Sun 9/2710:40 am -
1 stop4h 30m
Deal found 8/4$322
This Trip.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:25 am -
1 stop6h 27m
Fri 9/1110:40 am -
1 stop4h 30m
Deal found 8/5$324
This Trip.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:25 am -
1 stop6h 29m
Sun 8/3012:15 pm -
1 stop4h 26m
Deal found 8/3$332
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:50 pm -
1 stop4h 12m
Thu 10/810:40 am -
1 stop4h 30m
Deal found 8/3$334
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1511:25 am -
1 stop6h 27m
Fri 9/1810:40 am -
1 stop4h 30m
Deal found 8/2$335
This Trip.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/253:50 pm -
1 stop4h 12m
Sun 9/2710:40 am -
1 stop4h 30m
Deal found 8/4$336
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/253:50 pm -
1 stop4h 12m
Mon 9/2810:40 am -
1 stop4h 30m
Deal found 8/3$340
This Booking.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:40 pm -
Nonstop1h 31m
Sun 8/3010:25 am -
Nonstop1h 35m
Deal found 8/3$344

Find flight deals from Washington, D.C. to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Ottawa (YOW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$319
(Trip.com)

One-way from

$140
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$437

Good round-trip deal

$386 or less

Good one-way deal

$167 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Ottawa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Ottawa flights.
Search Deals
From Washington, D.C. (WAS) to Ottawa
Search Deals
One-way flight from Washington, D.C. (WAS) to Ottawa
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Ottawa.
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to Ottawa.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Ottawa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 7, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Tue 10/6

11:25 am-5:52 pm

1 stop6h 27m

Ottawa

Thu 10/15

10:40 am-3:10 pm

1 stop4h 30m

$353

Washington, D.C.Ottawa

DCA Washington, D.C. Reagan-National - YOW Ottawa

DCAYOW

Washington, D.C. Reagan-National

Sat 9/26

6:00 am-10:18 am

1 stop4h 18m

Ottawa

Tue 9/29

5:50 pm-9:50 pm

1 stop4h 00m

$385
Quickest round-trip

Washington, D.C.Ottawa

DCA Washington, D.C. Reagan-National - YOW Ottawa

DCAYOW

Washington, D.C. Reagan-National

Tue 10/13

12:40 pm-2:10 pm

Nonstop1h 30m

Ottawa

Fri 10/16

10:25 am-12:00 pm

Nonstop1h 35m

$398

Washington, D.C.Ottawa

DCA Washington, D.C. Reagan-National - YOW Ottawa

DCAYOW

Washington, D.C. Reagan-National

Tue 9/15

12:55 pm-2:27 pm

Nonstop1h 32m

Ottawa

Fri 9/18

10:40 am-12:14 pm

Nonstop1h 34m

$398

Washington, D.C.Ottawa

DCA Washington, D.C. Reagan-National - YOW Ottawa

DCAYOW

Washington, D.C. Reagan-National

Thu 9/17

6:00 am-10:18 am

1 stop4h 18m

Ottawa

Sun 9/20

10:40 am-12:14 pm

Nonstop1h 34m

$406

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Wed 9/23

12:35 pm-2:17 pm

Nonstop1h 42m

Ottawa

Sun 9/27

12:15 pm-4:38 pm

1 stop4h 23m

$423

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Tue 10/13

5:15 pm-6:55 pm

Nonstop1h 40m

Ottawa

Fri 10/16

12:15 pm-4:38 pm

1 stop4h 23m

$423

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 10/8

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Mon 10/12

12:15 pm-4:38 pm

1 stop4h 23m

$423

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 10/1

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Sat 10/3

12:15 pm-4:38 pm

1 stop4h 23m

$423

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 10/8

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Sat 10/10

12:15 pm-4:38 pm

1 stop4h 23m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/3

Showing 1-10 of 58 resultsSorted by cheapest first
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Compare providers for flights from Washington, D.C. to Ottawa

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 Washington, D.C. to Ottawa in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 Washington, D.C.-Ottawa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Ottawa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Ottawa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Ottawa flights, Cheapflights users trust FlightHub the most. FlightHub 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 Washington, D.C.-Ottawa 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 Washington, D.C. to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Washington, D.C. 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 Washington, D.C. to Ottawa

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of $434). Flying from Washington, D.C. to Ottawa in February is currently the most expensive (average of $647). 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 WAS to YOW?

Find hourly flight availability from Washington, D.C. to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 7, 2026.

It’s optimal to fly from Washington, D.C. to Ottawa in the morning. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from Washington, D.C. to Ottawa

Explore weekly flight availability from Washington, D.C. to Ottawa. 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 August 7, 2026.

The most flights from WAS to YOW are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Washington, D.C. to Ottawa?

Airfare is below average for this route at the moment.
Washington, D.C. to Ottawa flights typically cost between $391 and $540 in September.
The cheapest round-trip price found within the last 5 days was $315 on Porter Airlines (Sep 6-Sep 13).

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

The best time to book flights from Washington, D.C. to Ottawa is 75 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.

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ottawa. Reviews last updated August 7, 2026.
Peruse reviews from past customers who have flown with Porter Airlines,United Airlines, andAir Canada from Washington, D.C. to Ottawa to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
450 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
450 reviews
Porter Airlines
8.0
Very good
450 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,083 reviews
Porter Airlines
8.0
Very good
450 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,438 reviews
Porter Airlines
8.0
Very good
450 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Ottawa. 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 into for flights to Ottawa from Washington, D.C.?

    Located just 6.6 mi from the city center, Ottawa is the airport most travelers will use when flying to Ottawa from Washington, D.C.. Booking flights from Washington, D.C. to Ottawa (YOW) should be relatively easy as there are 9 daily inbound flights from Washington, D.C. from 3 different airlines.

  • How long is the flight from Washington, D.C. to Ottawa?

    For as low as $385, Porter Airlines can have you in Ottawa from Washington, D.C. in 4h 18m. Airlines will cover a distance of 452 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on Porter Airlines is currently your cheapest option to Ottawa, with prices starting at $169. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at $187 and $218, respectively. You may be able to fly from Washington, D.C. to Ottawa for 65% less than the average price by searching for these airlines.

  • What are the most popular routes from Washington, D.C. to Ottawa?

    When deciding which route to take from Washington, D.C. to Ottawa consider Washington, D.C. Dulles Intl - Ottawa, Washington, D.C. Reagan-National - Ottawa or Baltimore/Washington - Ottawa as they are the most popular.

  • What are the most reliable airlines from Washington, D.C. to Ottawa?

    Consider GoJet (80%), Air Canada (78%) or United Airlines (78%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. to Ottawa.

  • What are the cheapest flights from Washington, D.C. to Ottawa?

    While on average a flight from Washington, D.C. to Ottawa is generally $486, our data shows the cheapest flight currently is $144. When looking at the most popular route, (Washington, D.C. Dulles Intl - Ottawa), you can expect to pay $319 for that flight.

  • Can I find deals for flights from Washington, D.C. to Ottawa that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Ottawa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Ottawa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Ottawa.

  • Can I find deals for business class flights from Washington, D.C. to Ottawa?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Ottawa 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 Washington, D.C. to Ottawa?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of $434). Flying from Washington, D.C. to Ottawa in February is currently the most expensive (average of $647). 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

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau

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Top 3 airlines flying from Washington, D.C. to Ottawa

Discover the top 3 airlines that operate flights from Washington, D.C. to Ottawa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$169Average$384FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$187Average$494FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$218Average$506FlexibilityNo cancel feeOn-time69%

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