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$143+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Find cheap flights from Washington, D.C. to Ottawa with Cheapflights

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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Washington, D.C. to Ottawa are usually found in January or April, booked 21 days in advance, depart on a Saturday or Wednesday and return on a Friday

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 February 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Mon 4/138:30 pm
IAD
-
YOW
1 stop20h 43m
Multiple Airlines
Sat 4/188:40 am
YOW
-
IAD
1 stop3h 49m
Multiple Airlines
Deal found 2/1$328
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 3/186:25 am
BWI
-
YOW
1 stop11h 00m
Multiple Airlines
Wed 3/254:15 pm
YOW
-
BWI
1 stop16h 26m
Multiple Airlines
Deal found 2/1$336
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Mon 3/168:09 am
IAD
-
YOW
1 stop9h 08m
Multiple Airlines
Sat 3/218:40 am
YOW
-
IAD
1 stop3h 49m
Multiple Airlines
Deal found 2/1$339
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 5/88:09 am
IAD
-
YOW
2 stops16h 11m
Multiple Airlines
Mon 5/1111:00 am
YOW
-
IAD
1 stop4h 21m
Multiple Airlines
Deal found 2/1$349
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/2412:30 pm
BWI
-
YOW
1 stop11h 55m
Multiple Airlines
Mon 3/24:15 pm
YOW
-
BWI
1 stop16h 51m
Multiple Airlines
Deal found 2/2$349
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Wed 4/16:30 pm
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Wed 4/81:20 pm
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 2/2$351
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 2/1910:06 am
BWI
-
YOW
1 stop14h 19m
Multiple Airlines
Mon 2/234:15 pm
YOW
-
BWI
1 stop16h 51m
Multiple Airlines
Deal found 2/2$351
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/1911:40 am
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Thu 3/266:45 am
YOW
-
IAD
1 stop3h 39m
Porter Airlines
Deal found 2/2$354
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/2311:40 am
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Mon 3/26:45 am
YOW
-
IAD
1 stop3h 39m
Porter Airlines
Deal found 2/2$356
This flugladen.de deal was found by Cheapflights users on 2/1. 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.
Thu 3/1211:40 am
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Sun 3/1512:10 pm
YOW
-
IAD
1 stop5h 04m
Porter Airlines
Deal found 2/1$357
This Trip.com deal was found by Cheapflights users on 2/1. 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.
Wed 3/1811:40 am
IAD
-
YOW
1 stop5h 49m
Porter Airlines
Wed 3/256:45 am
YOW
-
IAD
1 stop3h 39m
Porter Airlines
Deal found 2/1$358
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/511:40 am
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Sun 3/812:10 pm
YOW
-
IAD
1 stop5h 04m
Porter Airlines
Deal found 2/2$359

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$328
(Kiwi.com)

One-way from

$143
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$375

Good round-trip deal

$360 or less

Good one-way deal

$186 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. 1% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 3, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ottawa that are best for you.

Fly from

Washington, D.C.

Fly to

Ottawa

Route

Depart

Return

Price

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Wed 3/18

6:25 am-5:25 pm

1 stop11h 00m

Ottawa

Wed 3/25

4:15 pm-8:41 am

1 stop16h 26m

$336

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 4/1

11:40 am-3:04 pm

1 stop3h 24m

Ottawa

Mon 4/6

6:50 am-10:24 am

1 stop3h 34m

$354

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 3/18

11:40 am-5:29 pm

1 stop5h 49m

Ottawa

Wed 3/25

6:45 am-10:24 am

1 stop3h 39m

$358

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 5/28

4:05 pm-7:39 pm

1 stop3h 34m

Ottawa

Sun 5/31

11:00 am-3:21 pm

1 stop4h 21m

$361

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Tue 2/24

12:30 pm-12:25 am

1 stop11h 55m

Ottawa

Wed 2/25

3:55 pm-8:24 am

2 stops16h 29m

$363

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Mon 4/13

8:44 pm-5:25 pm

1 stop20h 41m

Ottawa

Sat 4/18

9:30 am-8:48 pm

1 stop11h 18m

$369

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Thu 2/19

10:06 am-12:25 am

1 stop14h 19m

Ottawa

Tue 2/24

7:00 am-9:06 am

1 stop26h 06m

$369

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 4/9

11:40 am-3:04 pm

1 stop3h 24m

Ottawa

Sun 4/12

1:20 pm-5:14 pm

1 stop3h 54m

$380

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 4/1

3:15 pm-5:13 pm

2 stops25h 58m

Ottawa

Mon 4/6

1:20 pm-5:14 pm

1 stop3h 54m

$380

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Wed 4/1

7:40 pm-5:25 pm

2 stops21h 45m

Ottawa

Wed 4/8

7:00 am-3:57 pm

1 stop8h 57m

$404

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 56 results
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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 February.
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

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Ottawa. Price data was last updated on January 30, 2026.

The best time to book flights from Washington, D.C. to Ottawa is 21 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.

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of $112). Flying from Washington, D.C. to Ottawa in December is currently the most expensive (average of $221). 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 February 3, 2026.

It’s optimal to fly from Washington, D.C. to Ottawa at noon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the afternoon.

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 February 3, 2026.

The most flights from WAS to YOW are scheduled on a Monday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

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

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 February 3, 2026.
Peruse reviews from past customers who have flown with Porter Airlines, United Airlines, and Air 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
7.9
Good
412 reviews

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,236 reviews
Porter Airlines
7.9
Good
412 reviews

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,684 reviews
Porter Airlines
7.9
Good
412 reviews

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 8 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 $425, Porter Airlines can have you in Ottawa from Washington, D.C. in 1h 32m. 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 $171 and $189, respectively. You may be able to fly from Washington, D.C. to Ottawa for 58% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. to Ottawa one-way?

    $106 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Porter Airlines and United Airlines, with prices starting from $118 and $180, respectively.

  • 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 Republic Airways (84%), United Airlines (62%) or Air Canada (58%) 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 $347, our data shows the cheapest flight currently is $138. When looking at the most popular route, (Washington, D.C. Dulles Intl - Ottawa), you can expect to pay $328 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, March is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of $112). Flying from Washington, D.C. to Ottawa in December is currently the most expensive (average of $221). 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
Petawawa

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Alternative routes for Washington, D.C. to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
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Dulles Intl to Ottawa flights
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Reagan-National to Windsor flights
Dulles Intl to Sudbury flights
Dulles Intl to Thunder Bay flights
Dulles Intl to Sault Ste Marie flights
Reagan-National to London flights
Dulles Intl to London flights
Dulles Intl to Hamilton flights
Dulles Intl to Timmins flights
Dulles Intl to Kingston flights
Reagan-National to Sault Ste Marie flights
Reagan-National to Hamilton flights
Reagan-National to Kingston flights

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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$169Average$335FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$171Average$467FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$189Average$490FlexibilityNo cancel feeOn-time69%

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