YOW - IAD

C$ 258 Find Cheap Flights from Ottawa to Washington Dulles Airport – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 436
Typical prices: C$ 454-C$ 667
Porter Airlines
Tue 9/10Fri 12/10
YOW - IAD • 1 stop
Cheapest direct flights
C$ 571
Typical prices: C$ 541-C$ 730
United Airlines
Fri 21/12Wed 10/1
YOW - IAD • Direct
Direct flights
Every day
You can fly direct with United Airlines. Average duration is 1h 49m
Direct flights
+1
Direct flights
+1
When to travel
December
Cheapest • 17% price drop
January
Most popular
Good to know
+1
Good to know
+1
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We hope you enjoy your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Ottawa to Dulles Intl (YOW-IAD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to Dulles Intl

Fri, 9 Oct - Mon, 12 Oct
Porter Airlines Logo
10:40 a.m. - 3:10 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 30m1 stop Toronto Island
Porter Airlines Logo
3:50 p.m. - 8:02 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 12m1 stop Toronto Island
C$ 436Porter Airlines
Fri, 23 Oct - Sun, 25 Oct
Porter Airlines Logo
10:40 a.m. - 3:10 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 30m1 stop Toronto Island
Porter Airlines Logo
11:20 a.m. - 4:09 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 49m1 stop Toronto Island
C$ 436Porter Airlines
Thu, 8 Oct - Tue, 13 Oct
Porter Airlines Logo
10:40 a.m. - 3:10 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 30m1 stop Toronto Island
Porter Airlines Logo
11:25 a.m. - 5:52 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
6h 27m1 stop Toronto Island
C$ 436Porter Airlines
Thu, 15 Oct - Mon, 19 Oct
Air Canada Logo
11:15 a.m. - 2:57 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
3h 42m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:20 p.m. - 9:52 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 32m1 stop Toronto Island
C$ 451Air Canada
Sat, 17 Oct - Sat, 7 Nov
Air Canada Logo
11:15 a.m. - 3:00 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
3h 45m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:20 p.m. - 9:52 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 32m1 stop Toronto Island
C$ 474Air Canada
Thu, 15 Oct - Mon, 19 Oct
Air Canada Logo
11:15 a.m. - 2:57 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
3h 42m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:20 p.m. - 9:52 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 32m1 stop Toronto Island
C$ 474Air Canada
Tue, 27 Oct - Tue, 3 Nov
Multiple Airlines Logo
7:05 a.m. - 8:11 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
13h 06m1 stop Fort Lauderdale
Multiple Airlines Logo
6:07 p.m. - 5:58 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
23h 51m2 stops Fort Lauderdale Toronto Pearson Intl
C$ 496Multiple Airlines
Thu, 15 Oct - Mon, 19 Oct
Multiple Airlines Logo
2:52 p.m. - 4:35 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
1h 43mdirect
Multiple Airlines Logo
5:20 p.m. - 9:52 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 32m1 stop Toronto Island
C$ 520Multiple Airlines
Sun, 4 Oct - Mon, 5 Oct
United Airlines Logo
6:05 a.m. - 10:59 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
16h 54m1 stop Newark
United Airlines Logo
8:15 a.m. - 9:56 a.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
1h 41mdirect
C$ 539United Airlines
Wed, 23 Dec - Tue, 29 Dec
United Airlines Logo
2:00 p.m. - 4:01 p.m.YOW  Ottawa-IAD Washington, D.C. Dulles Intl
2h 01mdirect
United Airlines Logo
1:17 p.m. - 3:07 p.m.IAD  Washington, D.C. Dulles Intl-YOW Ottawa
1h 50mdirect
C$ 571United Airlines
Booking Insights

Price, demand, and travel trends for Ottawa to Washington, D.C. Dulles Intl Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Ottawa to Washington, D.C. Dulles Intl Airport with more confidence.

How much is a round-trip flight from Ottawa to Washington, D.C. Dulles Intl Airport?

Round-trip flights from Ottawa to Washington, D.C. Dulles Intl Airport start at C$ 436. Prices are below average for this route right now, with typical round-trip fares ranging from C$ 454 to C$ 667. The lowest price found in the past 5 days was C$ 436 on Porter Airlines.

What's the cheapest day of the week to fly from Ottawa to Washington, D.C. Dulles Intl Airport?

Thursday is the cheapest day of the week to fly from Ottawa to Washington, D.C. Dulles Intl Airport and is 12% cheaper than the average day. Friday is the most expensive day with flight prices 4% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Ottawa to Washington, D.C. Dulles Intl Airport?

  • December is the cheapest month to fly from Ottawa to Washington, D.C. Dulles Intl Airport at C$ 463 round-trip.
  • September (C$ 775) and February (C$ 657) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 67% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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Expert advice

Expert advice for your flight from Ottawa to Dulles Intl

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Mark Stachiew

Mark Stachiew

Expert on YOW

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Read more

Key details for Ottawa to Washington, D.C. Dulles Intl Airport flights

Low season

October

Cheapest flight

C$ 258
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (5% more expensive on average)
Flights from Ottawa to Washington, D.C. Dulles Intl Airport

When to book flights from Ottawa to Dulles Intl

Are your dates flexible? Find out the best times to travel from Ottawa to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Ottawa to Washington, D.C. Dulles Intl Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airlines offer extra legroom and free seat selection on Ottawa to Washington, D.C. Dulles Intl Airport flights?

    Among airlines operating Ottawa to Washington, D.C. Dulles Intl Airport flights:

    • Air Canada: offers free seat selection
    • United Airlines: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines are available on the route from Ottawa to Washington, D.C. Dulles Intl Airport?

    Only United Airlines operates flights between Ottawa and Washington, D.C. Dulles Intl Airport.

  • Which airports can I use when flying from Ottawa to Washington, D.C. Dulles Intl Airport?

    Flights from Ottawa to Washington, D.C. Dulles Intl Airport usually depart from Ottawa (YOW) and arrive at Washington, D.C. Dulles Intl (IAD).

  • Which airlines include bags at no extra cost on Ottawa to Washington, D.C. Dulles Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Air Canada: a carry-on bag and a checked bag in Economy Class
    • United Airlines: a carry-on bag and a checked bag in Economy Class
    • Lufthansa: a carry-on bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.

  • Which cabin classes can I book on flights from Ottawa to Washington, D.C. Dulles Intl Airport?

    Only Economy Class is available on flights from Ottawa to Washington, D.C. Dulles Intl Airport.

  • How much can I save by taking a layover when flying from Ottawa to Washington, D.C. Dulles Intl Airport?

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 477 round-trip via Toronto Island (YTZ), compared to C$ 611 for direct.

  • What is the standard checked bag allowance on flights from Ottawa to Washington, D.C. Dulles Intl Airport?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 34–C$ 96 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Ottawa to Washington, D.C. Dulles Intl Airport?

    The Embraer 175 (Enhanced Winglets) family is used most often on this route, operated mainly by United Airlines and Air Canada. Other aircraft seen on the route include Canadair (Bombardier) Regional Jet CRJ-550 variants.

  • Which airports do connecting flights from Ottawa to Washington, D.C. Dulles Intl Airport pass through?

    Most connecting flights from Ottawa to Washington, D.C. Dulles Intl Airport pass through Toronto Island (YTZ), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

  • Can I save money by using flexible dates for flights from Ottawa to Washington, D.C. Dulles Intl Airport?

    Yes. Being flexible with your travel dates can save you up to 15% on the Ottawa to Washington, D.C. Dulles Intl Airport route. Thursday is the cheapest departure day at C$ 497 round-trip on average, while Friday is the most expensive at C$ 583, a difference of C$ 86. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How are flight departures from Ottawa to Washington, D.C. Dulles Intl Airport spread across the day?

    Morning is the busiest departure period on Ottawa to Washington, D.C. Dulles Intl Airport flights, with 50% leaving in that window. Afternoon departures account for 50%, Evening flights for 0%, and Night flights for 0%.

  • Which popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Capital One Arena, National Mall, and Kennedy Center. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

  • What are the earliest and latest flights from Ottawa to Washington, D.C. Dulles Intl Airport?

    These are the earliest and latest flight times available from Ottawa to Washington, D.C. Dulles Intl Airport:

    • Earliest: departs at 6:00 am and lands at 7:49 am
    • Latest: departs at 7:30 pm and lands at 9:19 pm.

    The flight takes about 1h 49m.

  • How long does a flight from Ottawa to Washington, D.C. Dulles Intl Airport take?

    A direct flight from Ottawa to Washington, D.C. Dulles Intl Airport takes 1h 49m, covering 1,164 km.

  • Do I need a passport to fly from Ottawa to Washington, D.C. Dulles Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Ottawa to Washington, D.C. Dulles Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 432 to C$ 2,090. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from Ottawa to Washington, D.C. Dulles Intl Airport looking right now?

    One-way fares from Ottawa to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about C$ 280, which is 33% below the typical average for this route.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around C$ 33 for economy cars. Top options include:
    • Dollar
    • Budget
    • Hertz
    • Sixt
    • Thrifty

  • How much should I expect to pay for a Ottawa to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Ottawa to Washington, D.C. Dulles Intl Airport range from C$ 454 to C$ 667, with an average of C$ 559 over the past 12 months. Anything below C$ 454 counts as a good deal.

Your guide to booking Ottawa to Washington, D.C. Dulles Intl Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure instead of Friday. On this route, Thursday flights average C$ 497 – about C$ 86 less than Friday (15% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ottawa to Washington, D.C. Dulles Intl Airport trip for December. Fares historically average C$ 463 round-trip in that month – typically C$ 313 less than the most expensive month, which is September (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Toronto Island Airport (YTZ) can be cheaper than flying direct. The cheapest layover option averages C$ 477 round-trip on this route – about C$ 134 less than direct flights (based on the last 12 months).

Prefer to fly direct from Ottawa to Washington Dulles Airport?

 
Find which airlines fly direct from Ottawa Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Ottawa to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more nonstop flights

Direct returns

Washington, D.C. Dulles Intl to Ottawa

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more nonstop flights

More options for your flight from Ottawa to Dulles Intl

Complete your trip to Washington, D.C. with a hotel stay or car rental

Car rentals in Washington, D.C.
Hotels in Washington, D.C.
Vacations in Washington, D.C.