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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from £121

IAD — YOW
20 Oct — 27 Oct1
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

Thu 1/1015:50 -
1 stop5h 52m
Sun 4/1010:40 -
1 stop4h 30m
Deal found 17/9£269
Sun 1/1117:20 -
1 stop4h 32m
Sun 8/1112:05 -
1 stop4h 42m
Deal found 17/9£275
Fri 2/1006:10 -
1 stop11h 06m
Fri 2/1019:30 -
Nonstop1h 44m
Deal found 18/9£285
Tue 6/1008:15 -
Nonstop1h 41m
Thu 15/1006:00 -
Nonstop1h 43m
Deal found 17/9£302
Mon 5/1022:10 -
Nonstop1h 44m
Wed 7/1009:05 -
1 stop5h 52m
Deal found 16/9£308
Thu 1/1008:15 -
Nonstop1h 41m
Sun 4/1006:00 -
Nonstop1h 43m
Deal found 16/9£312
Wed 14/1015:47 -
1 stop5h 48m
Sat 17/1017:20 -
1 stop5h 32m
Deal found 19/9£320
Fri 9/1022:40 -
1 stop10h 31m
Mon 12/1015:10 -
1 stop7h 49m
Deal found 16/9£321
Mon 19/1008:15 -
Nonstop1h 41m
Mon 26/1012:05 -
1 stop4h 42m
Deal found 19/9£327

Find flight deals from Dulles Intl to Ottawa

Round-trip from

£269

One-way from

£121

Popular in

February

Cheapest in

December

Average price

£375
Porter Airlines
  • Porter Airlines
  • 1/10-4/10
  • 2 total stops
  • 10h 22m total
  • Washington, D.C. to Ottawa
Search Deals
Porter Airlines
  • Porter Airlines
  • 4/12-31/12
  • 1 total stop
  • 4h 49m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£14 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ottawa that are best for you.

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Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Sat 3/10

12:35-14:17

Nonstop1h 42m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£131

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Sun 22/11

17:37-19:27

Nonstop1h 50m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£131

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Wed 4/11

13:19-15:07

Nonstop1h 48m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£131

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 3/12

13:19-15:07

Nonstop1h 48m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£131

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Mon 5/10

22:10-23:54

Nonstop1h 44m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£131

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Thu 22/10

22:10-23:54

Nonstop1h 44m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£137

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 4/12

17:37-19:27

Nonstop1h 50m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£137

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 2/10

22:10-23:54

Nonstop1h 44m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£137

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Fri 23/10

22:10-23:54

Nonstop1h 44m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£137

Washington, D.C.Ottawa

IAD Washington, D.C. Dulles Intl - YOW Ottawa

IADYOW

Washington, D.C. Dulles Intl

Mon 25/1

13:20-15:10

Nonstop1h 50m

Ottawa

Wed 31/12

00:00-00:00

Nonstop0h 00m

£159

Flights are sorted by cheapest return flights first.

Deals found on 19/9

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 return price

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 £267). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of £564). 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?

When flying from Washington, D.C. Dulles Intl Airport to Ottawa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight 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 £326 and £512 in October.
The cheapest return price found within the last 5 days was £269 on Porter Airlines (1 Oct–4 Oct).

Related info for your journey

  • What airport do you fly into for flights to Ottawa from Washington, D.C. Dulles Intl?

    If you book a flight to Ottawa from Washington, D.C. Dulles Intl, you will be flying to Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There are 9 flights from Washington, D.C. Dulles Intl to Ottawa per day from 0 different airlines.

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

    United Airlines can get you from Washington, D.C. Dulles Intl Airport to Ottawa in just under 1h 44m. Your travel time will be generally consistent. Airlines will cover a distance of 449 mi. Generally, flights for this route are direct.

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

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Ottawa are GoJet (78%), Air Canada (77%) and United Airlines (75%).

  • 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 holiday 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 £267). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of £564). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Dulles Intl to Ottawa

Dulles Intl to Pearson Intl flights

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How does Cheapflights help users find flights from Dulles Intl to Ottawa?

Deals for Dulles Intl to Ottawa flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Ottawa?

Cheapflights simply makes it quick and affordable to book flights from Dulles Intl to Ottawa by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to Ottawa from Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ottawa from Dulles Intl today and book when prices fit your budget.

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