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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from C$ 225

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
31 May — 7 Jun1
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 1 May 2026.

Fri 19/64:00 p.m.
IAD
-
YOW
1 stop4h 04m
Porter Airlines
Mon 22/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 26/4C$ 472
Sun 7/65:30 p.m.
IAD
-
YOW
1 stop21h 30m
Multiple Airlines
Fri 12/611:00 a.m.
YOW
-
IAD
1 stop4h 21m
Multiple Airlines
Deal found 27/4C$ 473
Fri 12/64:05 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Fri 19/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 28/4C$ 476
Wed 17/64:05 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Fri 19/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 26/4C$ 479
Mon 15/611:30 a.m.
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Mon 22/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 26/4C$ 483
Fri 12/64:05 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Thu 18/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 28/4C$ 484
Tue 16/611:30 a.m.
IAD
-
YOW
1 stop6h 24m
Porter Airlines
Sat 20/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 26/4C$ 488
Fri 19/64:00 p.m.
IAD
-
YOW
1 stop4h 04m
Porter Airlines
Sat 27/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 30/4C$ 491
Thu 11/611:30 a.m.
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Thu 18/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 27/4C$ 492
Tue 23/611:30 a.m.
IAD
-
YOW
1 stop6h 24m
Porter Airlines
Mon 29/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Deal found 29/4C$ 495
Tue 26/511:30 a.m.
IAD
-
YOW
1 stop6h 24m
Porter Airlines
Fri 29/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Deal found 27/4C$ 498

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 1 May 2026.

Round-trip from

C$ 472

One-way from

C$ 225

Popular in

February

Cheapest in

December

Average price

C$ 737

Good one-way deal

C$ 311 or less
Porter Airlines
  • Porter Airlines
  • 19/6-22/6
  • 2 total stops
  • 8h 20m total
  • Washington, D.C. to Ottawa
Search Deals
12/6
  • 12/6
  • 1 total stop
  • 20h 34m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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 1 May 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

Fri 19/6

8:57 p.m.-3:00 p.m.

2 stops18h 03m

Ottawa

Sat 27/6

11:00 a.m.-3:16 p.m.

1 stop4h 16m

C$ 554

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 9/6

11:30 a.m.-2:54 p.m.

1 stop3h 24m

Ottawa

Wed 10/6

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

1 stop4h 21m

C$ 588

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 26/6

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

Nonstop1h 44m

Ottawa

Tue 30/6

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

Nonstop1h 44m

C$ 703

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 18/6

8:18 a.m.-10:03 a.m.

Nonstop1h 45m

Ottawa

Mon 22/6

7:30 p.m.-9:13 p.m.

Nonstop1h 43m

C$ 703
Quickest round-trip

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 9/6

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

Nonstop1h 42m

Ottawa

Sat 13/6

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

Nonstop1h 44m

C$ 703

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 1/8

8:18 a.m.-10:03 a.m.

Nonstop1h 45m

Ottawa

Sat 15/8

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

Nonstop1h 44m

C$ 703

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 30/7

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

Nonstop1h 44m

Ottawa

Sun 2/8

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

Nonstop1h 44m

C$ 703

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 15/6

8:18 a.m.-10:03 a.m.

Nonstop1h 45m

Ottawa

Sun 21/6

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

Nonstop1h 44m

C$ 703

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 27/5

8:18 a.m.-10:03 a.m.

Nonstop1h 45m

Ottawa

Sat 30/5

7:30 p.m.-9:13 p.m.

Nonstop1h 43m

C$ 703

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 31/5

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

Nonstop1h 44m

Ottawa

Fri 5/6

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

Nonstop1h 44m

C$ 703

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 23 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$ 488). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of C$ 956). 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 1 May 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 85% 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?

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 9 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 44m. Your travel time can differ by up to 1h 40m. 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 (88%), Air Canada (77%) or United Airlines (73%) 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$ 318 for a flight from Washington, D.C. Dulles Intl Airport to Ottawa. The cheapest flight overall is C$ 311 while the most popular route, (Washington, D.C. Dulles Intl - Ottawa) is currently priced at C$ 473.

  • 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$ 488). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of C$ 956). 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
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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