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Cheap flights from Ottawa to Washington, D.C. from $179

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 4/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
United Airlines Logo
7:30 pm - 9:23 pm
YOW
-
IAD
1h 53mnonstop
United Airlines Logo
8:25 am - 5:12 pm
IAD
-
YOW
8h 47m
2 stops
$314United Airlines
Mon, Mar 16 - Tue, Mar 17
Porter Airlines Logo
6:45 am - 10:24 am
YOW
-
IAD
3h 39m
1 stop
Porter Airlines Logo
6:30 pm - 10:29 pm
IAD
-
YOW
3h 59m
1 stop
$318Porter Airlines
Mon, Mar 9 - Fri, Mar 20
Porter Airlines Logo
1:20 pm - 5:14 pm
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
11:40 am - 5:29 pm
IAD
-
YOW
5h 49m
1 stop
$321Porter Airlines
Fri, Apr 3 - Mon, Apr 6
Porter Airlines Logo
1:20 pm - 5:14 pm
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
6:30 pm - 10:29 pm
IAD
-
YOW
3h 59m
1 stop
$322Porter Airlines
Sun, Apr 26 - Thu, Apr 30
Porter Airlines Logo
6:50 am - 10:22 am
YOW
-
IAD
3h 32m
1 stop
Porter Airlines Logo
11:40 am - 4:44 pm
IAD
-
YOW
5h 04m
1 stop
$324Porter Airlines
Thu, Feb 26 - Mon, Mar 2
Porter Airlines Logo
8:40 am - 12:29 pm
YOW
-
IAD
3h 49m
1 stop
Porter Airlines Logo
6:30 pm - 10:29 pm
IAD
-
YOW
3h 59m
1 stop
$327Porter Airlines
Sat, Apr 4 - Sun, Apr 5
Porter Airlines Logo
11:00 am - 5:14 pm
YOW
-
IAD
6h 14m
1 stop
Porter Airlines Logo
6:30 pm - 10:29 pm
IAD
-
YOW
3h 59m
1 stop
$330Porter Airlines
Fri, Mar 27 - Sun, Mar 29
Multiple Airlines Logo
4:20 pm - 7:24 am
YOW
-
IAD
15h 04m
1 stop
Multiple Airlines Logo
6:20 am - 12:02 am
IAD
-
YOW
17h 42m
2 stops
$331Multiple Airlines
Fri, Mar 6 - Wed, Mar 11
Air Canada Logo
10:30 am - 12:19 pm
YOW
-
DCA
1h 49mnonstop
Air Canada Logo
6:00 am - 9:41 am
DCA
-
YOW
3h 41m
1 stop
$344Air Canada
Mon, Mar 9 - Fri, Mar 20
Air Canada Logo
10:50 am - 3:31 pm
YOW
-
DCA
4h 41m
1 stop
Air Canada Logo
12:55 pm - 2:30 pm
DCA
-
YOW
1h 35mnonstop
$345Air Canada
Thu, Feb 26 - Mon, Mar 2

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

Our best United Airlines deals on Ottawa to Washington, D.C. flight tickets
United Airlines
Mar 16
YOW7:30 pmOttawa
1h 53m
IAD9:23 pmWashington, D.C. Dulles Intl
Mar 17
IAD8:25 amWashington, D.C. Dulles Intl
8h 47m
2 stops
YOW5:12 pmOttawa
$314
United Airlines
Jul 30
YOW6:00 amOttawa
1h 44m
IAD7:44 amWashington, D.C. Dulles Intl
Aug 3
IAD10:09 pmWashington, D.C. Dulles Intl
1h 45m
YOW11:54 pmOttawa
$414
United Airlines
Jul 30
YOW6:00 amOttawa
1h 44m
IAD7:44 amWashington, D.C. Dulles Intl
Aug 4
IAD3:42 pmWashington, D.C. Dulles Intl
5h 54m
1 stop
YOW9:36 pmOttawa
$424

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

Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
Porter Airlines
Mar 9
YOW6:45 amOttawa
3h 39m
1 stop
IAD10:24 amWashington, D.C. Dulles Intl
Mar 20
IAD6:30 pmWashington, D.C. Dulles Intl
3h 59m
1 stop
YOW10:29 pmOttawa
$318
Porter Airlines
Apr 3
YOW1:20 pmOttawa
3h 54m
1 stop
IAD5:14 pmWashington, D.C. Dulles Intl
Apr 6
IAD11:40 amWashington, D.C. Dulles Intl
5h 49m
1 stop
YOW5:29 pmOttawa
$321
Porter Airlines
Apr 26
YOW1:20 pmOttawa
3h 54m
1 stop
IAD5:14 pmWashington, D.C. Dulles Intl
Apr 30
IAD6:30 pmWashington, D.C. Dulles Intl
3h 59m
1 stop
YOW10:29 pmOttawa
$322

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 February 3, 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

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 3/16

7:30 pm-9:23 pm

Nonstop1h 53m

Washington, D.C. Dulles Intl

Tue 3/17

8:25 am-5:12 pm

2 stops8h 47m

$314

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 3/9

6:45 am-10:24 am

1 stop3h 39m

Washington, D.C. Dulles Intl

Fri 3/20

6:30 pm-10:29 pm

1 stop3h 59m

$318

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 4/3

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Mon 4/6

11:40 am-5:29 pm

1 stop5h 49m

$321

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 4/26

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Thu 4/30

6:30 pm-10:29 pm

1 stop3h 59m

$322

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/26

6:50 am-10:22 am

1 stop3h 32m

Washington, D.C. Dulles Intl

Mon 3/2

11:40 am-4:44 pm

1 stop5h 04m

$324

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 4/4

8:40 am-12:29 pm

1 stop3h 49m

Washington, D.C. Dulles Intl

Sun 4/5

6:30 pm-10:29 pm

1 stop3h 59m

$327

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 3/27

11:00 am-5:14 pm

1 stop6h 14m

Washington, D.C. Dulles Intl

Sun 3/29

6:30 pm-10:29 pm

1 stop3h 59m

$330

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 3/6

4:20 pm-7:24 am

1 stop15h 04m

Washington, D.C. Dulles Intl

Wed 3/11

6:20 am-12:02 am

2 stops17h 42m

$331

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 3/9

10:30 am-12:19 pm

Nonstop1h 49m

Washington, D.C. Reagan-National

Fri 3/20

6:00 am-9:41 am

1 stop3h 41m

$344

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 2/26

10:50 am-3:31 pm

1 stop4h 41m

Washington, D.C. Reagan-National

Mon 3/2

12:55 pm-2:30 pm

Nonstop1h 35m

$345

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 cheapest month to fly to Washington, D.C.?

The month of March is, on average, the cheapest month to fly to Washington, D.C. from Ottawa, with most prices found around $303. If you’re not able to fly to Washington, D.C. in March, then August is your next best option. Flight prices from Ottawa to Washington, D.C. during August average around $306.

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 Friday. momondo users have found tickets for Friday departures for as low as $535. 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 $707.

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 $496. 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 $722. 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. Reagan-National 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?

You could potentially save up to 11% on your flight if you consider stops on a Ottawa to Washington, D.C. flight.

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

As of February 2026, prices for Ottawa to Washington, D.C. flights are approximately 12% cheaper 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

$194

Fastest flight time

1h 35m

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 $194. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is $294.
The fastest flight from Ottawa to Washington, D.C. takes 1h 35m
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

  • 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 35m.

  • 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
United AirlinesPriceFrom $281Free CancellationRating
7.4
9,229 reviews
Search United Airlines flights
Air CanadaPriceFrom $296Free CancellationRating
7.1
10,676 reviews
Search Air Canada flights

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

    Across 26 United Airlines flights from Ottawa to Washington, D.C. this week, the average price was $443, with the best United Airlines deals starting from $281 round-trip. 9,229 users have rated United Airlines on momondo, with an average score of 7.4/10.

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

    $296 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 $397, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 10,676 user reviews) flies into Washington, D.C. from Ottawa 26 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
Gettysburg
Arlington
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Fairfax
Linthicum Heights
Bethesda
Glen Burnie

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