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$142+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
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 July, booked 32 days in advance, depart on a Wednesday or Saturday 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 March 21, 2026.

This SmartFares deal was found by Cheapflights users on 3/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:50 pm
DCA
-
YOW
1 stop4h 16m
Air Canada
Sun 4/2610:25 am
YOW
-
DCA
Nonstop1h 36m
Air Canada
Deal found 3/19$262
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 4/2011:40 am
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Tue 4/217:00 am
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 3/16$309
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Sat 4/181:45 pm
IAD
-
YOW
1 stop3h 44m
Porter Airlines
Tue 4/287:00 am
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 3/18$315
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/1611:40 am
IAD
-
YOW
1 stop5h 24m
Porter Airlines
Wed 4/296:45 am
YOW
-
IAD
1 stop4h 09m
Porter Airlines
Deal found 3/18$320
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/1411:40 am
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Sat 4/258:40 am
YOW
-
IAD
1 stop4h 19m
Porter Airlines
Deal found 3/18$321
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/206:35 am
BWI
-
YOW
1 stop10h 24m
Multiple Airlines
Wed 4/297:00 am
YOW
-
BWI
1 stop26h 17m
Multiple Airlines
Deal found 3/18$321
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Sat 4/181:45 pm
IAD
-
YOW
1 stop3h 44m
Porter Airlines
Fri 4/241:15 pm
YOW
-
IAD
1 stop3h 59m
Porter Airlines
Deal found 3/18$323
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/2111:40 am
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Tue 4/287:00 am
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 3/18$325
This Mytrip deal was found by Cheapflights users on 3/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:00 am
DCA
-
YOW
1 stop4h 11m
Air Canada
Sun 4/125:45 am
YOW
-
DCA
1 stop4h 34m
Air Canada
Deal found 3/18$328
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/1611:40 am
IAD
-
YOW
1 stop5h 24m
Porter Airlines
Thu 4/306:50 am
YOW
-
IAD
1 stop4h 04m
Porter Airlines
Deal found 3/18$328
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Sat 5/24:05 pm
BWI
-
YOW
1 stop24h 48m
Multiple Airlines
Sat 5/97:00 am
YOW
-
BWI
1 stop10h 07m
Multiple Airlines
Deal found 3/18$328
This Trip.com deal was found by Cheapflights users on 3/18. 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 4/3011:40 am
IAD
-
YOW
1 stop5h 24m
Porter Airlines
Sun 5/311:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Deal found 3/18$332

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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$262
(SmartFares)

One-way from

$142
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$478

Good round-trip deal

$284 or less

Good one-way deal

$176 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. 15% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 21, 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 - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 4/29

5:10 pm-6:55 pm

Nonstop1h 45m

Ottawa

Sun 5/3

2:40 pm-4:30 pm

Nonstop1h 50m

$412

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 4/29

11:40 am-3:04 pm

1 stop3h 24m

Ottawa

Sun 5/3

11:00 am-3:21 pm

1 stop4h 21m

$413
Quickest round-trip

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Thu 4/30

12:55 pm-2:27 pm

Nonstop1h 32m

Ottawa

Sun 5/3

10:25 am-12:01 pm

Nonstop1h 36m

$424

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 6/19

8:18 am-10:03 am

Nonstop1h 45m

Ottawa

Sun 6/28

6:00 am-7:44 am

Nonstop1h 44m

$438

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 7/15

6:10 am-1:59 pm

1 stop7h 49m

Ottawa

Sun 7/19

7:30 pm-9:13 pm

Nonstop1h 43m

$439

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Fri 5/15

6:00 am-3:15 pm

1 stop9h 15m

Ottawa

Sun 5/17

2:30 pm-7:11 am

1 stop16h 41m

$445

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 4/28

8:15 am-10:03 am

Nonstop1h 48m

Ottawa

Wed 4/29

6:00 am-7:50 am

Nonstop1h 50m

$472

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 5/22

10:10 pm-11:54 pm

Nonstop1h 44m

Ottawa

Mon 5/25

6:00 am-7:44 am

Nonstop1h 44m

$472

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 5/22

10:10 pm-11:54 pm

Nonstop1h 44m

Ottawa

Sun 5/24

10:00 am-11:43 am

Nonstop1h 43m

$472

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 4/9

8:15 am-10:03 am

Nonstop1h 48m

Ottawa

Sun 4/12

7:30 pm-9:18 pm

Nonstop1h 48m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Showing 1-10 of 54 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 March.
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 March 13, 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 March 21, 2026.

It’s optimal to fly from Washington, D.C. to Ottawa at noon. By choosing this option you can save up to 24% 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 March 21, 2026.

The most flights from WAS to YOW are scheduled on a Monday (9 on average). You will have fewer flight options on Wednesday, 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 March 21, 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
425 reviews

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
425 reviews
Porter Airlines
8.0
Very good
425 reviews

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,451 reviews
Porter Airlines
8.0
Very good
425 reviews

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,821 reviews
Porter Airlines
8.0
Very good
425 reviews

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 $424, United 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 United Airlines and Air Canada, with the lowest prices starting at $189 and $200, respectively. You may be able to fly from Washington, D.C. to Ottawa for 62% 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 GoJet (72%), United Airlines (72%) or Air Canada (70%) 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 $432, our data shows the cheapest flight currently is $155. When looking at the most popular route, (Washington, D.C. Dulles Intl - Ottawa), you can expect to pay $343 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$169Average$335FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$189Average$490FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$200Average$471FlexibilityNo cancel feeOn-time67%

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