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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from C$ 134

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
13 Dec — 20 Dec1
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 13 November 2025.

Round-trip from

C$ 408

One-way from

C$ 134

Popular in

May

Cheapest in

April

Average price

C$ 608
Porter Airlines
  • Porter Airlines
  • 13/12-15/12
  • 2 total stops
  • 7h 18m total
  • Washington, D.C. to Ottawa
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15/12
  • 15/12
  • 2 total stops
  • 25h 23m total
  • Washington, D.C. to Ottawa
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Highest demand for flights based on searches. 1% potential increase in price (C$ 9 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 November 2025
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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 13 November 2025.

Sat 13/121:45 p.m.IAD - YOW
1 stop3h 44mPorter Airlines
Mon 15/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Deal found 13/11C$ 408
Mon 15/1211:40 a.m.IAD - YOW
1 stop5h 49mPorter Airlines
Wed 24/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Deal found 12/11C$ 431
Wed 3/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Sat 13/128:40 a.m.YOW - IAD
1 stop3h 49mPorter Airlines
Deal found 11/11C$ 434
Tue 2/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Sat 13/128:40 a.m.YOW - IAD
1 stop3h 49mPorter Airlines
Deal found 11/11C$ 437
Thu 11/1211:40 a.m.IAD - YOW
1 stop5h 49mPorter Airlines
Thu 18/1212:10 p.m.YOW - IAD
1 stop5h 04mPorter Airlines
Deal found 11/11C$ 441
Thu 11/127:18 p.m.IAD - YOW
2 stops29h 07mMultiple Airlines
Thu 18/126:50 a.m.YOW - IAD
1 stop3h 34mMultiple Airlines
Deal found 11/11C$ 447
Sat 20/1211:40 a.m.IAD - YOW
1 stop5h 49mPorter Airlines
Fri 26/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Deal found 13/11C$ 448
Wed 3/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Wed 10/1211:40 a.m.YOW - IAD
1 stop5h 34mPorter Airlines
Deal found 11/11C$ 451
Tue 23/1211:40 a.m.IAD - YOW
1 stop5h 49mPorter Airlines
Mon 29/1212:10 p.m.YOW - IAD
1 stop5h 04mPorter Airlines
Deal found 12/11C$ 452
Tue 23/1211:40 a.m.IAD - YOW
1 stop5h 49mPorter Airlines
Fri 26/1212:10 p.m.YOW - IAD
1 stop5h 04mPorter Airlines
Deal found 13/11C$ 455
Wed 3/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Fri 12/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Deal found 11/11C$ 465
Tue 2/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Fri 12/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Deal found 11/11C$ 468

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 13 November 2025.
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 3/12

6:30 p.m.-10:29 p.m.

1 stop3h 59m

Ottawa

Sat 13/12

8:40 a.m.-12:29 p.m.

1 stop3h 49m

C$ 434

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 26/12

6:30 p.m.-10:29 p.m.

1 stop3h 59m

Ottawa

Sun 28/12

1:20 p.m.-5:14 p.m.

1 stop3h 54m

C$ 450

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 2/12

6:30 p.m.-10:29 p.m.

1 stop3h 59m

Ottawa

Fri 12/12

6:50 a.m.-10:24 a.m.

1 stop3h 34m

C$ 468

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 14/12

10:14 p.m.-11:54 p.m.

Nonstop1h 40m

Ottawa

Wed 17/12

9:45 a.m.-11:39 a.m.

Nonstop1h 54m

C$ 503

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 26/12

10:08 p.m.-11:54 p.m.

Nonstop1h 46m

Ottawa

Wed 31/12

5:59 p.m.-11:06 p.m.

1 stop5h 07m

C$ 524

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 4/12

11:40 a.m.-8:54 p.m.

1 stop9h 14m

Ottawa

Sun 7/12

4:15 p.m.-5:25 p.m.

2 stops25h 10m

C$ 531

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 4/12

6:30 p.m.-10:29 p.m.

1 stop3h 59m

Ottawa

Sun 7/12

1:20 p.m.-5:14 p.m.

1 stop3h 54m

C$ 553

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 28/11

8:35 a.m.-11:58 p.m.

1 stop15h 23m

Ottawa

Mon 1/12

4:15 p.m.-2:29 p.m.

2 stops22h 14m

C$ 591

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 3/1

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

1 stop3h 24m

Ottawa

Tue 6/1

8:55 p.m.-10:24 a.m.

1 stop13h 29m

C$ 607

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 3/1

10:08 p.m.-11:54 p.m.

Nonstop1h 46m

Ottawa

Tue 6/1

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

Nonstop1h 58m

C$ 608

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 21 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 158). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in August is currently the most expensive (average of C$ 357). 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 13 November 2025.

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 1h 40m. Your travel time can differ by up to 2h 19m. 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 (83%), Air Canada (81%) or United Airlines (81%) as they are the most reliable in getting you off to your destination on time.

  • 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 158). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in August is currently the most expensive (average of C$ 357). 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
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Prescott
Pembroke
Wakefield

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Can Cheapflights find flights from Dulles Intl to Ottawa with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Dulles Intl to Ottawa flexibly with Cheapflights today.

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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