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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from C$ 149

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
14 Feb — 21 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 15 January 2026.

Round-trip from

C$ 315

One-way from

C$ 149

Popular in

May

Cheapest in

April

Average price

C$ 545

Good one-way deal

C$ 227 or less
Porter Airlines
  • Porter Airlines
  • 23/2-27/2
  • 2 total stops
  • 11h 33m total
  • Washington, D.C. to Ottawa
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Porter Airlines
  • Porter Airlines
  • 6/2
  • 1 total stop
  • 4h 19m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 10 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Ottawa.
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Find flight deals from Dulles Intl to Ottawa

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Ottawa
Explore the most affordable flight options available from Dulles Intl to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 January 2026.

Fri 10/46:30 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Sat 18/48:40 a.m.
YOW
-
IAD
1 stop3h 49m
Porter Airlines
Deal found 15/1C$ 324
Wed 11/211:40 a.m.
IAD
-
YOW
1 stop5h 49m
Multiple Airlines
Wed 18/29:15 a.m.
YOW
-
IAD
1 stop6h 34m
Multiple Airlines
Deal found 14/1C$ 328
Thu 19/211:40 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Fri 20/212:10 p.m.
YOW
-
IAD
1 stop5h 04m
Porter Airlines
Deal found 14/1C$ 331
Sun 8/211:40 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Sun 15/21:20 p.m.
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 14/1C$ 334
Mon 16/36:30 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Sat 21/38:40 a.m.
YOW
-
IAD
1 stop3h 49m
Porter Airlines
Deal found 14/1C$ 336
Thu 12/211:40 a.m.
IAD
-
YOW
1 stop4h 04m
Porter Airlines
Thu 19/26:50 a.m.
YOW
-
IAD
1 stop3h 32m
Porter Airlines
Deal found 15/1C$ 339
Sat 28/21:50 p.m.
IAD
-
YOW
1 stop3h 49m
Porter Airlines
Sat 7/38:40 a.m.
YOW
-
IAD
1 stop3h 49m
Porter Airlines
Deal found 13/1C$ 353
Thu 9/46:30 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Sun 12/41:20 p.m.
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 14/1C$ 365
Sun 8/29:18 a.m.
IAD
-
YOW
2 stops39h 21m
Multiple Airlines
Sat 21/28:40 a.m.
YOW
-
IAD
1 stop3h 54m
Multiple Airlines
Deal found 15/1C$ 389
Fri 6/211:40 a.m.
IAD
-
YOW
1 stop4h 19m
Porter Airlines
Fri 13/21:20 p.m.
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 14/1C$ 392
Sun 1/211:40 a.m.
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Thu 5/27:00 a.m.
YOW
-
IAD
1 stop3h 22m
Porter Airlines
Deal found 14/1C$ 393
Mon 9/210:10 p.m.
IAD
-
YOW
Nonstop1h 44m
United Airlines
Wed 11/22:15 p.m.
YOW
-
IAD
Nonstop1h 58m
United Airlines
Deal found 13/1C$ 395

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 15 January 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ottawa that are best for you.

Fly from

Dulles Intl

Fly to

Ottawa

Route

Depart

Return

Price

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 25/2

11:40 a.m.-6:09 p.m.

1 stop6h 29m

Ottawa

Sat 28/2

8:40 a.m.-12:34 p.m.

1 stop3h 54m

C$ 339

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 25/2

8:15 a.m.-5:07 p.m.

1 stop8h 52m

Ottawa

Wed 25/2

7:30 p.m.-9:23 p.m.

Nonstop1h 53m

C$ 370

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 9/2

10:10 p.m.-11:54 p.m.

Nonstop1h 44m

Ottawa

Wed 11/2

7:27 p.m.-9:25 p.m.

Nonstop1h 58m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 7/2

5:10 p.m.-6:52 p.m.

Nonstop1h 42m

Ottawa

Sat 14/2

9:45 a.m.-11:44 a.m.

Nonstop1h 59m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 15/2

5:11 p.m.-6:55 p.m.

Nonstop1h 44m

Ottawa

Mon 16/2

7:30 p.m.-9:23 p.m.

Nonstop1h 53m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 7/2

5:10 p.m.-6:52 p.m.

Nonstop1h 42m

Ottawa

Sat 21/2

7:30 p.m.-9:23 p.m.

Nonstop1h 53m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 23/2

10:13 p.m.-11:54 p.m.

Nonstop1h 41m

Ottawa

Wed 25/2

2:15 p.m.-4:11 p.m.

Nonstop1h 56m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 21/2

10:13 p.m.-11:54 p.m.

Nonstop1h 41m

Ottawa

Sun 1/3

7:30 p.m.-9:23 p.m.

Nonstop1h 53m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 11/2

12:43 p.m.-2:27 p.m.

Nonstop1h 44m

Ottawa

Wed 18/2

7:30 p.m.-9:23 p.m.

Nonstop1h 53m

C$ 395

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 25/2

12:43 p.m.-2:27 p.m.

Nonstop1h 44m

Ottawa

Thu 26/2

7:30 p.m.-9:23 p.m.

Nonstop1h 53m

C$ 395

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 22 results
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Best time to book a flight from Dulles Intl to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Dulles Intl 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. Dulles Intl Airport to Ottawa

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 156). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in December is currently the most expensive (average of C$ 361). 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 IAD to YOW?

Find hourly flight availability from Dulles Intl 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 15 January 2026.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Ottawa at noon. Doing so could potentially save you 83% on the flight price compared to flying in the afternoon, which is usually more expensive.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl?

    Most people fly into Ottawa (YOW) if they book a flight to Ottawa from Washington, D.C. Dulles Intl. On average, Ottawa has 7 inbound flights from Washington, D.C. Dulles Intl per day from 0 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

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

    Porter Airlines and United Airlines can get you from Washington, D.C. Dulles Intl Airport to Ottawa in just under 6h 29m. Your travel time can differ by up to 2h 23m. Airlines will cover a distance of 723 km. Both multi-stop and direct flights can be found to your destination and back.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Ottawa consider choosing Republic Airways (81%), United Airlines (69%) or Avianca (62%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay C$ 428 for a flight from Washington, D.C. Dulles Intl Airport to Ottawa. The cheapest flight overall is C$ 227 while the most popular route, (Washington, D.C. Dulles Intl - Ottawa) is currently priced at C$ 325.

  • Can I find deals for flights from Dulles Intl to Ottawa that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Ottawa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Ottawa?

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

  • Can I find deals for business class flights from Dulles Intl to Ottawa?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Ottawa?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 156). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in December is currently the most expensive (average of C$ 361). 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
Pembroke
Wakefield

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Can Cheapflights notify me if prices for flights from Dulles Intl to Ottawa become cheaper?

Yes, Cheapflights offers price alerts on Dulles Intl to Ottawa flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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