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Cheap flights from Ottawa to Washington, D.C. from $175

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Washington, D.C. departing on 7/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
12:15 pm - 4:32 pm
YOW
-
IAD
4h 17m
1 stop
Air Canada Logo
5:15 pm - 9:52 pm
IAD
-
YOW
4h 37m
1 stop
$301Air Canada
Wed, Jul 1 - Sun, Jul 5
Air Canada Logo
12:15 pm - 4:32 pm
YOW
-
IAD
4h 17m
1 stop
Air Canada Logo
9:45 am - 1:54 pm
IAD
-
YOW
4h 09m
1 stop
$304Air Canada
Thu, Jul 2 - Sat, Jul 4
Air Canada Logo
12:15 pm - 4:12 pm
YOW
-
IAD
3h 57m
1 stop
Air Canada Logo
5:15 pm - 9:51 pm
IAD
-
YOW
4h 36m
1 stop
$320Air Canada
Thu, Oct 8 - Sun, Nov 1
Air Canada Logo
12:15 pm - 4:12 pm
YOW
-
IAD
3h 57m
1 stop
Air Canada Logo
5:15 pm - 9:52 pm
IAD
-
YOW
4h 37m
1 stop
$329Air Canada
Fri, Sep 4 - Mon, Sep 7
Air Canada Logo
12:15 pm - 4:32 pm
YOW
-
IAD
4h 17m
1 stop
Air Canada Logo
5:15 pm - 9:52 pm
IAD
-
YOW
4h 37m
1 stop
$333Air Canada
Thu, Jul 2 - Sun, Jul 5
Air Canada Logo
12:15 pm - 4:32 pm
YOW
-
IAD
4h 17m
1 stop
Air Canada Logo
5:15 pm - 9:52 pm
IAD
-
YOW
4h 37m
1 stop
$335Air Canada
Wed, Jul 22 - Thu, Jul 23
Air Canada Logo
12:15 pm - 4:32 pm
YOW
-
IAD
4h 17m
1 stop
Air Canada Logo
5:15 pm - 9:52 pm
IAD
-
YOW
4h 37m
1 stop
$337Air Canada
Thu, Jul 2 - Sun, Jul 5
Porter Airlines Logo
10:40 am - 3:16 pm
YOW
-
IAD
4h 36m
1 stop
Porter Airlines Logo
4:00 pm - 8:04 pm
IAD
-
YOW
4h 04m
1 stop
$340Porter Airlines
Wed, Jul 1 - Sun, Jul 5
Air Canada Logo
12:15 pm - 4:32 pm
YOW
-
IAD
4h 17m
1 stop
Air Canada Logo
5:15 pm - 9:52 pm
IAD
-
YOW
4h 37m
1 stop
$342Air Canada
Sat, Jun 27 - Sun, Jun 28
Porter Airlines Logo
10:40 am - 3:11 pm
YOW
-
IAD
4h 31m
1 stop
Porter Airlines Logo
3:50 pm - 9:44 pm
IAD
-
YOW
5h 54m
1 stop
$343Porter Airlines
Fri, Jul 31 - Mon, Aug 3

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Air Canada flights from Ottawa to Washington, D.C. Dulles Intl Airport

Our best Air Canada deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
Air Canada
Jul 1
YOW12:15 pmOttawa
4h 17m
1 stop
IAD4:32 pmWashington, D.C. Dulles Intl
Jul 5
IAD5:15 pmWashington, D.C. Dulles Intl
4h 37m
1 stop
YOW9:52 pmOttawa
$301
Air Canada
Jul 2
YOW12:15 pmOttawa
4h 17m
1 stop
IAD4:32 pmWashington, D.C. Dulles Intl
Jul 4
IAD9:45 amWashington, D.C. Dulles Intl
4h 09m
1 stop
YOW1:54 pmOttawa
$304
Air Canada
Oct 8
YOW12:15 pmOttawa
3h 57m
1 stop
IAD4:12 pmWashington, D.C. Dulles Intl
Nov 1
IAD5:15 pmWashington, D.C. Dulles Intl
4h 36m
1 stop
YOW9:51 pmOttawa
$320

Porter Airlines flights from Ottawa to Washington, D.C. Dulles Intl Airport

Our best Porter Airlines deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
Porter Airlines
Jul 1
YOW10:40 amOttawa
4h 36m
1 stop
IAD3:16 pmWashington, D.C. Dulles Intl
Jul 5
IAD4:00 pmWashington, D.C. Dulles Intl
4h 04m
1 stop
YOW8:04 pmOttawa
$340
Porter Airlines
Jul 31
YOW10:40 amOttawa
4h 31m
1 stop
IAD3:11 pmWashington, D.C. Dulles Intl
Aug 3
IAD3:50 pmWashington, D.C. Dulles Intl
5h 54m
1 stop
YOW9:44 pmOttawa
$343
Porter Airlines
Sep 4
YOW10:40 amOttawa
4h 30m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Sep 7
IAD3:50 pmWashington, D.C. Dulles Intl
5h 54m
1 stop
YOW9:44 pmOttawa
$347

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated June 10, 2026.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 7/1

12:15 pm-4:32 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Sun 7/5

5:15 pm-9:52 pm

1 stop4h 37m

$301
Quickest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 7/2

12:15 pm-4:32 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Sat 7/4

9:45 am-1:54 pm

1 stop4h 09m

$304

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/8

12:15 pm-4:12 pm

1 stop3h 57m

Washington, D.C. Dulles Intl

Sun 11/1

5:15 pm-9:51 pm

1 stop4h 36m

$320

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 9/4

12:15 pm-4:12 pm

1 stop3h 57m

Washington, D.C. Dulles Intl

Mon 9/7

5:15 pm-9:52 pm

1 stop4h 37m

$329

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 7/2

12:15 pm-4:32 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Sun 7/5

5:15 pm-9:52 pm

1 stop4h 37m

$333

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 7/22

12:15 pm-4:32 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Thu 7/23

5:15 pm-9:52 pm

1 stop4h 37m

$335

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 7/2

12:15 pm-4:32 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Sun 7/5

5:15 pm-9:52 pm

1 stop4h 37m

$337

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 7/1

10:40 am-3:16 pm

1 stop4h 36m

Washington, D.C. Dulles Intl

Sun 7/5

4:00 pm-8:04 pm

1 stop4h 04m

$340

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 6/27

12:15 pm-4:32 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Sun 6/28

5:15 pm-9:52 pm

1 stop4h 37m

$342

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 7/31

10:40 am-3:11 pm

1 stop4h 31m

Washington, D.C. Dulles Intl

Mon 8/3

3:50 pm-9:44 pm

1 stop5h 54m

$343

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Ottawa to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ottawa and Washington, D.C. Dulles Intl Airport?

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

In general, January is the cheapest month to fly from Ottawa to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $306. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $307.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $558. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to Washington, D.C. Dulles Intl Airport for around $775.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Ottawa in the morning is the least expensive time of day to depart. momondo users have found prices as low as $512 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $711 on average. Flights to Washington, D.C. Dulles Intl Airport from Ottawa at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Ottawa to Washington, D.C. Dulles Intl flight route?

Fly from Ottawa to Washington, D.C. Dulles Intl for the best Ottawa - Washington, D.C. Dulles Intl flight prices

What cabin class options are available on Ottawa to Washington, D.C. Dulles Intl Airport flights?

There are 4 cabin classes available to choose from on Ottawa to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ottawa to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 8% on your flight if you consider stops on a Ottawa to Washington, D.C. Dulles Intl Airport flight.

How have Ottawa to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of June 2026, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 45% more expensive when compared to flights at the same time last year.

When to book flights from Ottawa to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ottawa to Washington, D.C. Dulles Intl Airport (YOW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Washington, D.C. Dulles Intl Airport

Best Price Found

$319

Fastest flight time

1h 35m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Ottawa in the past 72 hours is $319. The best round-trip flight deal from Ottawa to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $451.
The fastest flight from Ottawa to Washington, D.C. Dulles Intl Airport takes 1h 35m
Direct flights go from Ottawa to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Ottawa to Washington, D.C. Dulles Intl Airport

  • How far is Ottawa to Washington, D.C. Dulles Intl by plane?

    The distance between Ottawa and Washington, D.C. Dulles Intl is about 455.4 mi. By plane, this route typically takes 1h 35m.

  • When did momondo last update prices for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Ottawa Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ottawa Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Ottawa to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Ottawa to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Ottawa to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Ottawa to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $338Free CancellationRating
7.4
9,804 reviews
Search United Airlines flights
Air CanadaPriceFrom $377Free CancellationRating
7.1
11,154 reviews
Search Air Canada flights

  • United Airlines Flights From Ottawa to Washington, D.C. Dulles Intl Airport

    Across 27 United Airlines flights from Ottawa to Washington, D.C. Dulles Intl Airport this week, the average price was $443, with the best United Airlines deals starting from $338 round-trip. 9,804 users have rated United Airlines on momondo, with an average score of 7.4/10.

  • Air Canada Flights From Ottawa to Washington, D.C. Dulles Intl Airport

    Air Canada (7.1/10 from 11,154 reviews) operates around 28 flights from Ottawa to Washington, D.C. Dulles Intl Airport in any given week. The average Air Canada airfare for this route is around $410, with deals from around $377 rare but found on momondo. Referenced prices are for round-trip Ottawa to Washington, D.C. Dulles Intl Airport flight searches in the last 72 hours.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Laurel
Gaithersburg
Fredericksburg
Colonial Beach
Rockville
Silver Spring
Linthicum Heights
Towson
Manassas
Sterling
Tysons
Springfield
Fairfax

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ottawa to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Ottawa to Washington, D.C. with flexible booking policies on momondo?

All flight searches from Ottawa to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ottawa to Washington, D.C.?

Once all potential Ottawa to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ottawa to Washington, D.C. right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Ottawa and alert you when they change.

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