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Cheap flights from Washington, D.C. to Ottawa from C$ 147

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 Tuesday or Saturday 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 11 September 2025.

Round-trip from

C$ 359

One-way from

C$ 147

Popular in

March

Cheapest in

January

Average price

C$ 563

Good one-way deal

C$ 269 or less
2/10-7/10
  • 2/10-7/10
  • 2 total stops
  • 42h 18m total
  • Washington, D.C. to Ottawa
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1/10
  • 1/10
  • 1 total stop
  • 24h 33m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 22 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 16 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 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 11 September 2025.

Thu 2/109:37 p.m.BWI - YOW
1 stop19h 20mMultiple Airlines
Tue 7/103:50 p.m.YOW - BWI
1 stop22h 58mMultiple Airlines
Deal found 9/9C$ 359
Tue 7/1011:19 a.m.BWI - YOW
1 stop29h 38mMultiple Airlines
Fri 17/103:50 p.m.YOW - BWI
1 stop17h 44mMultiple Airlines
Deal found 9/9C$ 360
Tue 7/1011:19 a.m.BWI - YOW
1 stop29h 38mMultiple Airlines
Mon 13/103:50 p.m.YOW - BWI
1 stop19h 11mMultiple Airlines
Deal found 9/9C$ 369
Tue 7/1011:19 a.m.BWI - YOW
1 stop29h 38mMultiple Airlines
Thu 16/103:50 p.m.YOW - BWI
1 stop20h 04mMultiple Airlines
Deal found 9/9C$ 370
Tue 7/1011:19 a.m.BWI - YOW
1 stop29h 38mMultiple Airlines
Wed 15/103:50 p.m.YOW - BWI
1 stop19h 11mMultiple Airlines
Deal found 9/9C$ 373
Thu 2/108:59 p.m.IAD - YOW
2 stops27h 23mMultiple Airlines
Tue 7/105:55 a.m.YOW - IAD
1 stop9h 11mMultiple Airlines
Deal found 9/9C$ 376
Fri 24/1012:29 p.m.BWI - YOW
1 stop28h 28mMultiple Airlines
Fri 31/109:30 a.m.YOW - BWI
1 stop10h 46mMultiple Airlines
Deal found 9/9C$ 378
Mon 6/106:56 a.m.BWI - YOW
1 stop10h 24mMultiple Airlines
Fri 17/103:50 p.m.YOW - BWI
1 stop17h 44mMultiple Airlines
Deal found 9/9C$ 384
Thu 2/109:37 p.m.BWI - YOW
1 stop19h 20mMultiple Airlines
Mon 6/103:50 p.m.YOW - BWI
1 stop19h 11mMultiple Airlines
Deal found 9/9C$ 388
Mon 6/106:56 a.m.BWI - YOW
1 stop10h 24mMultiple Airlines
Mon 13/103:50 p.m.YOW - BWI
1 stop19h 11mMultiple Airlines
Deal found 9/9C$ 392
Mon 6/106:56 a.m.BWI - YOW
1 stop10h 24mMultiple Airlines
Thu 16/103:50 p.m.YOW - BWI
1 stop20h 04mMultiple Airlines
Deal found 9/9C$ 395
Wed 8/108:00 a.m.BWI - YOW
1 stop8h 57mMultiple Airlines
Fri 17/103:50 p.m.YOW - BWI
1 stop17h 44mMultiple Airlines
Deal found 9/9C$ 396

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 629,999 searches. Data last updated 11 September 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

Thu 2/10

9:37 p.m.-4:57 p.m.

1 stop19h 20m

Ottawa

Tue 7/10

3:50 p.m.-2:48 p.m.

1 stop22h 58m

C$ 359

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Thu 2/10

9:37 p.m.-4:57 p.m.

1 stop19h 20m

Ottawa

Mon 6/10

3:50 p.m.-11:01 a.m.

1 stop19h 11m

C$ 388

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Wed 1/10

4:24 p.m.-4:57 p.m.

1 stop24h 33m

Ottawa

Mon 6/10

3:50 p.m.-11:01 a.m.

1 stop19h 11m

C$ 406

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Thu 2/10

9:38 a.m.-12:22 a.m.

2 stops14h 44m

Ottawa

Sun 12/10

3:50 p.m.-11:54 a.m.

1 stop20h 04m

C$ 437

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Mon 27/10

6:56 a.m.-5:25 p.m.

1 stop10h 29m

Ottawa

Thu 30/10

9:30 a.m.-7:26 p.m.

1 stop9h 56m

C$ 468

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Sun 28/9

6:50 a.m.-5:20 p.m.

1 stop10h 30m

Ottawa

Tue 30/9

4:25 p.m.-3:29 p.m.

1 stop23h 04m

C$ 484

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Fri 10/10

6:56 a.m.-5:20 p.m.

1 stop10h 24m

Ottawa

Tue 14/10

3:50 p.m.-11:01 a.m.

1 stop19h 11m

C$ 496

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 30/10

11:40 a.m.-3:04 p.m.

1 stop3h 24m

Ottawa

Sun 2/11

7:30 p.m.-9:22 p.m.

Nonstop1h 52m

C$ 499

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Thu 4/12

5:10 a.m.-5:25 p.m.

1 stop12h 15m

Ottawa

Sun 7/12

4:15 p.m.-11:25 a.m.

1 stop19h 10m

C$ 516

BaltimoreOttawa

BWI - YOW

BWIYOW

Baltimore/Washington

Fri 10/10

8:21 p.m.-5:20 p.m.

1 stop20h 59m

Ottawa

Mon 13/10

3:50 p.m.-11:01 a.m.

1 stop19h 11m

C$ 527

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 56 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 29 August 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of C$ 224). Flying from Washington, D.C. to Ottawa in December is currently the most expensive (average of C$ 326). 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 11 September 2025.

When flying from Washington, D.C. to Ottawa, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 65% versus 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 11 September 2025.

The most flights from WAS to YOW are scheduled on a Wednesday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 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 11 September 2025.
Get a feel of what it's like to fly with Porter Airlines and Air Canada from Washington, D.C. to Ottawa by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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.?

    Ottawa (YOW), located 10.6 km from the city centre, is the airport you fly into when you book flights from Washington, D.C. to Ottawa. 2 airlines have flights to Ottawa from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Ottawa should not be difficult; the airport handles an average of 8 inbound flights from Washington, D.C. per day.

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

    For as low as C$ 576, Porter Airlines can have you in Ottawa from Washington, D.C. in 4h 11m. The distance from Washington, D.C. to Ottawa is about 727 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    Our cheapest airline available from Washington, D.C. to Ottawa is Air Canada. Our recent data shows that you can find tickets from as low as C$ 280 on this airline. An additional option worth looking into is Porter Airlines, starting at C$ 393. Air Canada is 47% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The most popular route from Washington, D.C. to Ottawa is Washington, D.C. Dulles Intl - Ottawa. You may also consider Washington, D.C. Reagan-National - Ottawa or Baltimore/Washington - Ottawa.

  • 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.

  • 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 C$ 224). Flying from Washington, D.C. to Ottawa in December is currently the most expensive (average of C$ 326). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Smiths Falls
Perth
Prescott
Pembroke
Wakefield

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Washington, D.C. to Ottawa

Discover the top 2 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 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 280AverageC$ 565FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 393AverageC$ 483FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Washington, D.C. to Ottawa?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington, D.C. to Ottawa. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Ottawa?

Cheapflights simply makes it quick and affordable to book flights from Washington, D.C. to Ottawa by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Washington, D.C. to Ottawa with no change fees?

Yes! Cheapflights helps users easily find flights from Washington, D.C. to Ottawa with no change fees.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Ottawa become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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