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$125+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Ottawa are usually found in January or November, booked 57 days in advance, depart on a Saturday or Monday and return on a Friday

Cheap 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 September 15, 2025.

Round-trip from

$289
(Kiwi.com)

One-way from

$125
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$452

Good round-trip deal

$357 or less

Good one-way deal

$198 or less
From Washington, D.C. (WAS) to Ottawa
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One-way flight from Washington, D.C. (WAS) to Ottawa
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Highest demand for flights based on searches. 3% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Ottawa.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to Ottawa.
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Find 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 September 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/38:21 amBWI - YOW
2 stops16h 01mMultiple Airlines
Mon 10/64:25 pmYOW - BWI
1 stop17h 55mMultiple Airlines
Deal found 9/14$294
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/298:00 amBWI - YOW
1 stop9h 13mMultiple Airlines
Wed 11/59:30 amYOW - BWI
1 stop23h 04mMultiple Airlines
Deal found 9/14$309
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/138:21 pmBWI - YOW
1 stop20h 59mMultiple Airlines
Mon 10/204:25 pmYOW - BWI
1 stop17h 55mMultiple Airlines
Deal found 9/13$311
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/145:20 pmBWI - YOW
1 stop24h 00mMultiple Airlines
Tue 10/213:50 pmYOW - BWI
1 stop19h 11mMultiple Airlines
Deal found 9/14$315
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 11/2011:40 amIAD - YOW
1 stop13h 02mMultiple Airlines
Fri 11/285:40 amYOW - IAD
1 stop11h 34mMultiple Airlines
Deal found 9/13$319
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 11/221:45 pmIAD - YOW
1 stop10h 57mMultiple Airlines
Fri 11/285:40 amYOW - IAD
1 stop11h 34mMultiple Airlines
Deal found 9/13$322
This Trip.com deal was found by Cheapflights users on 9/14. 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.
Sun 10/1211:35 amIAD - YOW
1 stop4h 59mPorter Airlines
Sun 10/198:35 amYOW - IAD
1 stop6h 31mPorter Airlines
Deal found 9/14$325
This Trip.com deal was found by Cheapflights users on 9/13. 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 10/911:35 amIAD - YOW
1 stop4h 59mPorter Airlines
Thu 10/168:35 amYOW - IAD
1 stop6h 31mPorter Airlines
Deal found 9/13$326
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/36:45 pmIAD - YOW
1 stop29h 55mMultiple Airlines
Mon 10/69:35 amYOW - IAD
1 stop5h 31mMultiple Airlines
Deal found 9/14$327
This Trip.com deal was found by Cheapflights users on 9/14. 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 10/2911:40 amIAD - YOW
1 stop3h 24mPorter Airlines
Wed 11/56:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Deal found 9/14$329
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 11/216:30 pmIAD - YOW
1 stop22h 59mMultiple Airlines
Fri 11/285:40 amYOW - IAD
1 stop11h 34mMultiple Airlines
Deal found 9/13$330
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 11/81:45 pmIAD - YOW
1 stop3h 44mMultiple Airlines
Thu 11/135:40 amYOW - IAD
1 stop11h 34mMultiple Airlines
Deal found 9/13$331

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 September 15, 2025.
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 10/29

8:00 am-5:13 pm

1 stop9h 13m

Ottawa

Wed 11/5

9:30 am-8:34 am

1 stop23h 04m

$309

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Tue 10/14

5:20 pm-5:20 pm

1 stop24h 00m

Ottawa

Tue 10/21

3:50 pm-11:01 am

1 stop19h 11m

$315

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 11/7

11:40 am-5:29 pm

1 stop5h 49m

Ottawa

Tue 11/11

12:10 pm-5:14 pm

1 stop5h 04m

$325

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 10/9

11:35 am-4:34 pm

1 stop4h 59m

Ottawa

Thu 10/16

9:35 am-3:06 pm

1 stop5h 31m

$326

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 10/9

11:35 am-4:34 pm

1 stop4h 59m

Ottawa

Sat 10/18

9:35 am-3:06 pm

1 stop5h 31m

$326

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Fri 10/3

6:50 am-5:20 pm

1 stop10h 30m

Ottawa

Mon 10/6

4:25 pm-10:20 am

1 stop17h 55m

$330

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Thu 11/20

8:45 pm-11:58 pm

1 stop27h 13m

Ottawa

Fri 11/28

5:40 am-11:38 pm

2 stops17h 58m

$333

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Sat 10/11

4:12 pm-6:09 pm

2 stops25h 57m

Ottawa

Sat 10/18

3:50 pm-11:01 am

1 stop19h 11m

$333

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Wed 10/15

4:00 pm-5:20 pm

1 stop25h 20m

Ottawa

Sat 10/18

3:50 pm-11:01 am

1 stop19h 11m

$335

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 10/10

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Sun 10/12

7:00 am-10:16 am

1 stop3h 16m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 42 results
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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 September 12, 2025.

The best time to book flights from Washington, D.C. to Ottawa is 57 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, January is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of $294). Flying from Washington, D.C. to Ottawa in September is currently the most expensive (average of $419). 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 September 15, 2025.

It’s optimal to fly from Washington, D.C. to Ottawa in the morning. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from Washington, D.C. to Ottawa?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Ottawa. Price data was last updated on November 18, 2024.

Travelers seeking maximum savings on their Washington, D.C. to Ottawa flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 15, 2025.

The most flights from WAS to YOW are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 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 September 15, 2025.
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
363 reviews

Crew

8.6

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews

Crew

8.6

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,929 reviews
Porter Airlines
7.9
Good
363 reviews

Crew

8.6

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
363 reviews

Crew

8.6

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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 $325, Porter Airlines can have you in Ottawa from Washington, D.C. in 5h 49m. Airlines will cover a distance of 449 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 $179. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at $181 and $218, respectively. You may be able to fly from Washington, D.C. to Ottawa for 53% 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 (75%), Air Canada (75%) or United Airlines (75%) 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 $552, our data shows the cheapest flight currently is $212. 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, January is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of $294). Flying from Washington, D.C. to Ottawa in September is currently the most expensive (average of $419). 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.
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Dulles Intl to Sudbury flights
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$179Average$335FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$181Average$448FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$218Average$495FlexibilityNo cancel feeOn-time69%

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