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Cheap flights from Ottawa to Washington, D.C. from $168

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 9/2. 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

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Porter Airlines Logo
10:40 am - 3:10 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 30m1 stop Toronto Island
Porter Airlines Logo
11:25 am - 7:07 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
7h 42m1 stop Toronto Island
$318Porter Airlines
Fri, Oct 2 - Sat, Oct 10
Air Canada Logo
12:15 pm - 4:38 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 23m1 stop Toronto Island
Air Canada Logo
5:15 pm - 9:52 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 37m1 stop Toronto Island
$319Air Canada
Sat, Oct 3 - Sat, Oct 10
Air Canada Logo
12:15 pm - 4:38 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 23m1 stop Toronto Island
Air Canada Logo
5:20 pm - 9:52 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 32m1 stop Toronto Island
$319Air Canada
Thu, Sep 10 - Sun, Sep 13
Air Canada Logo
10:40 am - 12:14 pmYOW  Ottawa-DCA Washington, D.C. Reagan-National
1h 34mnonstop
Air Canada Logo
12:55 pm - 2:27 pmDCA  Washington, D.C. Reagan-National-YOW Ottawa
1h 32mnonstop
$319Air Canada
Thu, Sep 10 - Sun, Sep 13
Porter Airlines Logo
10:30 am - 3:45 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
5h 15m1 stop Toronto Island
Porter Airlines Logo
3:50 pm - 8:47 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 57m1 stop Toronto Island
$339Porter Airlines
Fri, Sep 4 - Tue, Sep 8
United Airlines Logo
3:10 pm - 7:20 amYOW  Ottawa-IAD Washington, D.C. Dulles Intl
16h 10m1 stop Newark
United Airlines Logo
1:19 pm - 3:07 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
1h 48mnonstop
$352United Airlines
Sun, Nov 22 - Mon, Nov 23
United Airlines Logo
3:10 pm - 10:59 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
7h 49m1 stop Newark
United Airlines Logo
8:15 am - 9:56 amIAD  Washington, D.C. Dulles Intl-YOW Ottawa
1h 41mnonstop
$354United Airlines
Thu, Sep 24 - Fri, Sep 25
Porter Airlines Logo
10:40 am - 3:10 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 30m1 stop Toronto Island
Porter Airlines Logo
11:20 am - 4:09 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 49m1 stop Toronto Island
$367Porter Airlines
Fri, Oct 23 - Mon, Oct 26
Porter Airlines Logo
10:40 am - 3:10 pmYOW  Ottawa-IAD Washington, D.C. Dulles Intl
4h 30m1 stop Toronto Island
Porter Airlines Logo
11:20 am - 4:09 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
4h 49m1 stop Toronto Island
$368Porter Airlines
Fri, Oct 23 - Mon, Oct 26
United Airlines Logo
9:45 am - 11:48 amYOW  Ottawa-IAD Washington, D.C. Dulles Intl
2h 03mnonstop
United Airlines Logo
1:20 pm - 3:10 pmIAD  Washington, D.C. Dulles Intl-YOW Ottawa
1h 50mnonstop
$404United Airlines
Wed, Dec 9 - Sat, Jan 9

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Air Canada flights from Ottawa to Washington, D.C.

Our best Air Canada deals on Ottawa to Washington, D.C. flight tickets
Air Canada
Sep 10
YOW12:15 pmOttawa
4h 23m
1 stop
IAD4:38 pmWashington, D.C. Dulles Intl
Sep 13
IAD5:20 pmWashington, D.C. Dulles Intl
4h 32m
1 stop
YOW9:52 pmOttawa
$319
Air Canada
Oct 8
YOW12:15 pmOttawa
4h 23m
1 stop
IAD4:38 pmWashington, D.C. Dulles Intl
Oct 13
IAD5:15 pmWashington, D.C. Dulles Intl
4h 37m
1 stop
YOW9:52 pmOttawa
$320
Air Canada
Sep 5
YOW12:25 pmOttawa
4h 43m
1 stop
IAD5:08 pmWashington, D.C. Dulles Intl
Sep 12
IAD3:45 pmWashington, D.C. Dulles Intl
4h 59m
1 stop
YOW8:44 pmOttawa
$322

Porter Airlines flights from Ottawa to Washington, D.C.

Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
Porter Airlines
Oct 11
YOW10:40 amOttawa
4h 30m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Oct 12
IAD3:50 pmWashington, D.C. Dulles Intl
4h 12m
1 stop
YOW8:02 pmOttawa
$315
Porter Airlines
Oct 2
YOW10:40 amOttawa
4h 30m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Oct 10
IAD11:25 amWashington, D.C. Dulles Intl
7h 42m
1 stop
YOW7:07 pmOttawa
$318
Porter Airlines
Sep 4
YOW10:30 amOttawa
5h 15m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
Sep 8
IAD3:50 pmWashington, D.C. Dulles Intl
4h 57m
1 stop
YOW8:47 pmOttawa
$339

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Washington, D.C. 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 August 11, 2026.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Fri 10/2

10:40 am-3:10 pm

1 stop4h 30m

Washington, D.C. Dulles Intl

Sat 10/10

11:25 am-7:07 pm

1 stop7h 42m

$318

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Sat 10/3

12:15 pm-4:38 pm

1 stop4h 23m

Washington, D.C. Dulles Intl

Sat 10/10

5:15 pm-9:52 pm

1 stop4h 37m

$319

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Thu 9/10

12:15 pm-4:38 pm

1 stop4h 23m

Washington, D.C. Dulles Intl

Sun 9/13

5:20 pm-9:52 pm

1 stop4h 32m

$319
Quickest round-trip

OttawaWashington, D.C.

YOW Ottawa - DCA Washington, D.C. Reagan-National

YOWDCA

Ottawa

Thu 9/10

10:40 am-12:14 pm

Nonstop1h 34m

Washington, D.C. Reagan-National

Sun 9/13

12:55 pm-2:27 pm

Nonstop1h 32m

$319

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Fri 9/4

10:30 am-3:45 pm

1 stop5h 15m

Washington, D.C. Dulles Intl

Tue 9/8

3:50 pm-8:47 pm

1 stop4h 57m

$339

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Sun 11/22

3:10 pm-7:20 am

1 stop16h 10m

Washington, D.C. Dulles Intl

Mon 11/23

1:19 pm-3:07 pm

Nonstop1h 48m

$352

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Thu 9/24

3:10 pm-10:59 pm

1 stop7h 49m

Washington, D.C. Dulles Intl

Fri 9/25

8:15 am-9:56 am

Nonstop1h 41m

$354

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Fri 10/23

10:40 am-3:10 pm

1 stop4h 30m

Washington, D.C. Dulles Intl

Mon 10/26

11:20 am-4:09 pm

1 stop4h 49m

$367

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Fri 10/23

10:40 am-3:10 pm

1 stop4h 30m

Washington, D.C. Dulles Intl

Mon 10/26

11:20 am-4:09 pm

1 stop4h 49m

$368

OttawaWashington, D.C.

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

YOWIAD

Ottawa

Wed 12/9

9:45 am-11:48 am

Nonstop2h 03m

Washington, D.C. Dulles Intl

Sat 1/9

1:20 pm-3:10 pm

Nonstop1h 50m

$404

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.

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.?

Prices are currently low for flights on this route.

Typical prices usually range from $371 to $449.
The lowest price recently found on this route was $319.

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

The month of January is, on average, the cheapest month to fly to Washington, D.C. from Ottawa, with most prices found around $332. If you’re not able to fly to Washington, D.C. in January, then December is your next best option. Flight prices from Ottawa to Washington, D.C. during December average around $354.

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

On average, the least expensive day to fly to Washington, D.C. from Ottawa is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $528. However, this price may fluctuate depending on the airline, the season, and holidays. 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. for around $709.

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

In the morning is the cheapest time of day to fly from Ottawa to Washington, D.C. when you can find flight prices for as low as $485. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $727. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

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

There are 4 cabin classes available to choose from on Ottawa to Washington, D.C. 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. flights?

No. A direct flight is the cheapest option for a flight between Ottawa to Washington, D.C..

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

As of August 2026, prices for Ottawa to Washington, D.C. flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from Ottawa to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Washington, D.C. 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. (YOW to WAS) flight deals and tips

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

Best Price Found

$199

Fastest flight time

1h 34m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The best one-way flight to Washington, D.C. from Ottawa in the past 72 hours is $199. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is $349.
The fastest flight from Ottawa to Washington, D.C. takes 1h 34m
Direct flights go from Ottawa to Washington, D.C. every day.
There are 2 airports in Washington, D.C.. From Ottawa there are direct flights to Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD).
Search flight deals

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

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

    The distance between Ottawa and Washington, D.C. is about 454.6 mi. In terms of flight time, this usually takes a little over 1h 34m.

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

    Prices for flights from Ottawa Airport to Washington, D.C. are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Washington, D.C..

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

    The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Ottawa to Washington, D.C.

Compare and see reviews for airlines that fly from Ottawa to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $284Free CancellationRating
7.1
11,462 reviews
Search Air Canada flights
United AirlinesPriceFrom $344Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights

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

    Across 17 United Airlines flights from Ottawa to Washington, D.C. this week, the average price was $471, with the best United Airlines deals starting from $344 round-trip. 10,104 users have rated United Airlines on momondo, with an average score of 7.4/10.

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

    $284 is the best Air Canada flight deal from Ottawa to Washington, D.C. found on momondo over the last 72 hours. The average Air Canada ticket price found was closer to $401, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 11,462 user reviews) flies into Washington, D.C. from Ottawa 17 times in an average week so prices can vary.

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
Arlington
Gettysburg
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Silver Spring
Towson
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood
Glen Burnie
College Park

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?

Flights from Ottawa to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Ottawa to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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 not ready to book a flight from Ottawa to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport