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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from C$ 212

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
28 Aug — 4 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 29 July 2026.

Thu 27/83:50 p.m.
IAD
-
YOW
1 stop5h 54m
Porter Airlines
Mon 31/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 28/7C$ 446
Fri 21/811:25 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Mon 24/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 24/7C$ 451
Thu 20/811:25 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Mon 24/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 28/7C$ 453
Thu 20/83:50 p.m.
IAD
-
YOW
1 stop5h 54m
Porter Airlines
Sun 23/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 28/7C$ 478
Tue 29/911:25 a.m.
IAD
-
YOW
1 stop6h 27m
Porter Airlines
Fri 9/1010:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 28/7C$ 483
Sun 4/1011:25 a.m.
IAD
-
YOW
1 stop6h 27m
Porter Airlines
Sun 11/1010:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 28/7C$ 491
Sat 15/83:50 p.m.
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Mon 17/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 25/7C$ 498
Tue 1/93:50 p.m.
IAD
-
YOW
1 stop16h 15m
Porter Airlines
Sat 5/910:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 28/7C$ 514
Fri 28/83:50 p.m.
IAD
-
YOW
1 stop5h 54m
Porter Airlines
Mon 31/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 26/7C$ 515
Thu 3/93:50 p.m.
IAD
-
YOW
1 stop4h 12m
Porter Airlines
Tue 8/910:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 27/7C$ 519
Fri 18/93:50 p.m.
IAD
-
YOW
1 stop4h 12m
Porter Airlines
Sun 20/910:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 25/7C$ 522

Find 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 29 July 2026.

Round-trip from

C$ 446

One-way from

C$ 212

Popular in

February

Cheapest in

December

Average price

C$ 725

Good round-trip deal

C$ 1,599 or less

Good one-way deal

C$ 329 or less
Porter Airlines
  • Porter Airlines
  • 27/8-31/8
  • 2 total stops
  • 10h 24m total
  • Washington, D.C. to Ottawa
Search Deals
Porter Airlines
  • Porter Airlines
  • 17/8
  • 1 total stop
  • 4h 14m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Ottawa.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Ottawa.
Search Deals

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 29 July 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 20/8

3:50 p.m.-8:04 p.m.

1 stop4h 14m

Ottawa

Sun 23/8

10:40 a.m.-3:10 p.m.

1 stop4h 30m

C$ 645

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 1/10

8:15 a.m.-9:56 a.m.

Nonstop1h 41m

Ottawa

Sat 3/10

12:15 p.m.-4:38 p.m.

1 stop4h 23m

C$ 679

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 25/11

6:10 a.m.-1:11 p.m.

1 stop7h 01m

Ottawa

Wed 25/11

4:36 p.m.-12:30 a.m.

1 stop7h 54m

C$ 715
Quickest round-trip

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 1/10

8:15 a.m.-9:56 a.m.

Nonstop1h 41m

Ottawa

Sat 3/10

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

C$ 725

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 3/9

8:15 a.m.-9:56 a.m.

Nonstop1h 41m

Ottawa

Tue 8/9

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

C$ 725

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 10/10

12:35 p.m.-2:17 p.m.

Nonstop1h 42m

Ottawa

Mon 12/10

7:30 p.m.-9:14 p.m.

Nonstop1h 44m

C$ 725

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 14/10

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

Nonstop1h 44m

Ottawa

Sat 17/10

2:52 p.m.-4:35 p.m.

Nonstop1h 43m

C$ 725

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 1/11

5:37 p.m.-7:27 p.m.

Nonstop1h 50m

Ottawa

Wed 11/11

2:00 p.m.-3:53 p.m.

Nonstop1h 53m

C$ 725

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 2/9

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

Nonstop1h 44m

Ottawa

Mon 7/9

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

C$ 725

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 18/9

8:15 a.m.-9:56 a.m.

Nonstop1h 41m

Ottawa

Sun 20/9

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

C$ 725

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 21 resultsSorted by cheapest first
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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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 505). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of C$ 1,065). 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 29 July 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 86% on the flight price compared to flying in the afternoon, which is usually more expensive.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Ottawa?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Ottawa flights typically cost between C$ 629 and C$ 739 in August.
The cheapest round-trip price found within the last 5 days was C$ 446 on Porter Airlines (27 Aug-31 Aug).

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 8 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 4h 14m. Your travel time can differ by up to 2h 47m. 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 (86%), United Airlines (80%) or Air Canada (80%) 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$ 964 for a flight from Washington, D.C. Dulles Intl Airport to Ottawa. The cheapest flight overall is C$ 329 while the most popular route, (Washington, D.C. Dulles Intl - Ottawa) is currently priced at C$ 515.

  • 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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 505). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of C$ 1,065). 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
Prescott
Wakefield
Pembroke
Smiths Falls

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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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