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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from C$ 234

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
5 Mar — 12 Mar1
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 3 February 2026.

Mon 13/48:30 p.m.
IAD
-
YOW
1 stop20h 43m
Multiple Airlines
Sat 18/48:40 a.m.
YOW
-
IAD
1 stop3h 49m
Multiple Airlines
Deal found 1/2C$ 448
Mon 16/38:09 a.m.
IAD
-
YOW
1 stop9h 08m
Multiple Airlines
Sat 21/38:40 a.m.
YOW
-
IAD
1 stop3h 49m
Multiple Airlines
Deal found 1/2C$ 463
Thu 12/311:40 a.m.
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Fri 13/311:00 a.m.
YOW
-
IAD
1 stop6h 14m
Porter Airlines
Deal found 3/2C$ 475
Fri 8/58:09 a.m.
IAD
-
YOW
2 stops16h 11m
Multiple Airlines
Mon 11/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Multiple Airlines
Deal found 1/2C$ 477
Wed 1/46:30 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Wed 8/41:20 p.m.
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 2/2C$ 479
Thu 19/311:40 a.m.
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Thu 26/36:45 a.m.
YOW
-
IAD
1 stop3h 39m
Porter Airlines
Deal found 2/2C$ 483
Mon 23/211:40 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Mon 2/36:45 a.m.
YOW
-
IAD
1 stop3h 39m
Porter Airlines
Deal found 2/2C$ 486
Thu 12/311:40 a.m.
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Sun 15/312:10 p.m.
YOW
-
IAD
1 stop5h 04m
Porter Airlines
Deal found 1/2C$ 488
Wed 18/311:40 a.m.
IAD
-
YOW
1 stop5h 49m
Porter Airlines
Wed 25/36:45 a.m.
YOW
-
IAD
1 stop3h 39m
Porter Airlines
Deal found 1/2C$ 489
Thu 5/311:40 a.m.
IAD
-
YOW
1 stop5h 04m
Porter Airlines
Sun 8/312:10 p.m.
YOW
-
IAD
1 stop5h 04m
Porter Airlines
Deal found 2/2C$ 490
Sat 14/31:45 p.m.
IAD
-
YOW
1 stop3h 44m
Porter Airlines
Sun 22/312:10 p.m.
YOW
-
IAD
1 stop5h 04m
Porter Airlines
Deal found 1/2C$ 492
Mon 23/211:40 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Sat 28/28:40 a.m.
YOW
-
IAD
1 stop3h 54m
Porter Airlines
Deal found 2/2C$ 493

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 3 February 2026.

Round-trip from

C$ 448

One-way from

C$ 234

Popular in

May

Cheapest in

April

Average price

C$ 485
Porter Airlines
  • Porter Airlines
  • 13/4-18/4
  • 2 total stops
  • 24h 32m total
  • Washington, D.C. to Ottawa
Search Deals
Porter Airlines
  • Porter Airlines
  • 20/5
  • 1 total stop
  • 5h 39m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 3 February 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 18/3

11:40 a.m.-5:29 p.m.

1 stop5h 49m

Ottawa

Wed 25/3

6:45 a.m.-10:24 a.m.

1 stop3h 39m

C$ 489

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 28/5

4:05 p.m.-7:39 p.m.

1 stop3h 34m

Ottawa

Sun 31/5

11:00 a.m.-3:21 p.m.

1 stop4h 21m

C$ 493

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 20/3

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

1 stop3h 59m

Ottawa

Fri 27/3

9:15 a.m.-3:46 p.m.

1 stop6h 31m

C$ 512

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 1/4

3:15 p.m.-5:13 p.m.

2 stops25h 58m

Ottawa

Mon 6/4

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

1 stop3h 54m

C$ 518

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 9/4

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

1 stop3h 24m

Ottawa

Sun 12/4

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

1 stop3h 54m

C$ 519

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 23/2

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

1 stop6h 29m

Ottawa

Sun 1/3

12:10 p.m.-5:14 p.m.

1 stop5h 04m

C$ 559

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 23/2

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

1 stop6h 29m

Ottawa

Thu 26/2

6:50 a.m.-10:22 a.m.

1 stop3h 32m

C$ 595

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 28/5

5:16 p.m.-7:05 p.m.

Nonstop1h 49m

Ottawa

Sun 31/5

6:00 a.m.-7:44 a.m.

Nonstop1h 44m

C$ 683

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 28/5

4:05 p.m.-9:44 p.m.

1 stop5h 39m

Ottawa

Sun 31/5

11:00 a.m.-3:21 p.m.

1 stop4h 21m

C$ 684

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 10/4

8:15 a.m.-10:03 a.m.

Nonstop1h 48m

Ottawa

Sun 12/4

10:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 688

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/2

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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 153). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in December is currently the most expensive (average of C$ 355). 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 3 February 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 can get you from Washington, D.C. Dulles Intl Airport to Ottawa in just under 5h 49m. Your travel time can differ by up to . Airlines will cover a distance of 723 km.

  • 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 (84%), United Airlines (62%) or Air Canada (58%) 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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 153). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in December is currently the most expensive (average of C$ 355). 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 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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