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Cheap flights from Washington, D.C. to Ottawa from $151

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Ottawa departing on 9/23. 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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0 bags

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

Cheap round-trip flights

Porter Airlines Logo
4:20 pm - 8:34 pmIAD-YOW
4h 14m1 stop
Porter Airlines Logo
8:35 am - 3:06 pmYOW-IAD
6h 31m1 stop
$326Porter Airlines
Find Deal
Wed, Oct 1 - Thu, Oct 2
Logo
9:15 am - 2:56 pmIAD-YOW
29h 41m2 stops
Logo
5:55 am - 3:06 pmYOW-IAD
9h 11m1 stop
$332
Find Deal
Wed, Sep 24 - Wed, Oct 1
Logo
7:14 pm - 4:57 pmIAD-YOW
21h 43m1 stop
Logo
7:00 am - 10:16 amYOW-IAD
3h 16m1 stop
$334
Find Deal
Mon, Sep 15 - Thu, Sep 18
Logo
7:14 pm - 4:57 pmIAD-YOW
21h 43m1 stop
Logo
11:00 am - 3:06 pmYOW-IAD
4h 06m1 stop
$335
Find Deal
Mon, Sep 15 - Fri, Sep 26
Logo
7:14 pm - 4:57 pmIAD-YOW
21h 43m1 stop
Logo
7:00 am - 10:16 amYOW-IAD
3h 16m1 stop
$336
Find Deal
Mon, Sep 15 - Fri, Sep 19
Porter Airlines Logo
4:20 pm - 8:34 pmIAD-YOW
4h 14m1 stop
Porter Airlines Logo
1:20 pm - 5:34 pmYOW-IAD
4h 14m1 stop
$337Porter Airlines
Find Deal
Wed, Oct 22 - Wed, Dec 3
Air Canada Logo
6:00 am - 10:25 amDCA-YOW
4h 25m1 stop
Air Canada Logo
6:00 am - 10:20 amYOW-DCA
4h 20m1 stop
$341Air Canada
Find Deal
Thu, Sep 18 - Sun, Sep 21
Air Canada Logo
12:55 pm - 2:26 pmDCA-YOW
1h 31mnonstop
Air Canada Logo
10:25 am - 12:08 pmYOW-DCA
1h 43mnonstop
$351Air Canada
Find Deal
Sat, Sep 20 - Thu, Sep 25
United Airlines Logo
12:35 pm - 2:13 pmIAD-YOW
1h 38mnonstop
United Airlines Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
$399United Airlines
Find Deal
Thu, Sep 18 - Sun, Sep 21
United Airlines Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
United Airlines Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
$404United Airlines
Find Deal
Sat, Sep 20 - Sun, Sep 21

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

Our best Air Canada deals on Washington, D.C. to Ottawa flight tickets
Air Canada
Sep 18
DCA6:00 amWashington, D.C. Reagan-National
4h 25m
1 stop
YOW10:25 amOttawa
Sep 21
YOW6:00 amOttawa
4h 20m
1 stop
DCA10:20 amWashington, D.C. Reagan-National
$341
Find similar
Air Canada
Sep 20
DCA12:55 pmWashington, D.C. Reagan-National
1h 31m
YOW2:26 pmOttawa
Sep 25
YOW10:25 amOttawa
1h 43m
DCA12:08 pmWashington, D.C. Reagan-National
$351
Find similar
Air Canada
Sep 27
DCA4:35 pmWashington, D.C. Reagan-National
3h 39m
1 stop
YOW8:14 pmOttawa
Sep 30
YOW10:25 amOttawa
1h 43m
DCA12:08 pmWashington, D.C. Reagan-National
$356
Find similar

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

Our best United Airlines deals on Washington, D.C. to Ottawa flight tickets
United Airlines
Sep 18
IAD12:35 pmWashington, D.C. Dulles Intl
1h 38m
YOW2:13 pmOttawa
Sep 21
YOW7:29 pmOttawa
1h 43m
IAD9:12 pmWashington, D.C. Dulles Intl
$399
Find similar
United Airlines
Sep 20
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
Sep 21
YOW7:29 pmOttawa
1h 43m
IAD9:12 pmWashington, D.C. Dulles Intl
$404
Find similar
United Airlines
Sep 25
IAD12:35 pmWashington, D.C. Dulles Intl
1h 38m
YOW2:13 pmOttawa
Sep 25
YOW5:25 pmOttawa
6h 56m
1 stop
IAD12:21 amWashington, D.C. Dulles Intl
$421
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Ottawa 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 28, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 10/1

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Thu 10/2

8:35 am-3:06 pm

1 stop6h 31m

$326

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 9/24

9:15 am-2:56 pm

2 stops29h 41m

Ottawa

Wed 10/1

5:55 am-3:06 pm

1 stop9h 11m

$332

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 9/15

7:14 pm-4:57 pm

1 stop21h 43m

Ottawa

Thu 9/18

7:00 am-10:16 am

1 stop3h 16m

$334

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 9/15

7:14 pm-4:57 pm

1 stop21h 43m

Ottawa

Fri 9/26

11:00 am-3:06 pm

1 stop4h 06m

$335

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 9/15

7:14 pm-4:57 pm

1 stop21h 43m

Ottawa

Fri 9/19

7:00 am-10:16 am

1 stop3h 16m

$336

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 10/22

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Wed 12/3

1:20 pm-5:34 pm

1 stop4h 14m

$337

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Thu 9/18

6:00 am-10:25 am

1 stop4h 25m

Ottawa

Sun 9/21

6:00 am-10:20 am

1 stop4h 20m

$341

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Sat 9/20

12:55 pm-2:26 pm

Nonstop1h 31m

Ottawa

Thu 9/25

10:25 am-12:08 pm

Nonstop1h 43m

$351

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 9/18

12:35 pm-2:13 pm

Nonstop1h 38m

Ottawa

Sun 9/21

7:29 pm-9:12 pm

Nonstop1h 43m

$399

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 9/20

8:16 am-9:58 am

Nonstop1h 42m

Ottawa

Sun 9/21

7:29 pm-9:12 pm

Nonstop1h 43m

$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 Ottawa from

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

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 Washington, D.C. and Ottawa?

What is the cheapest month to fly to Ottawa?

In general, January is the cheapest month to fly from Washington, D.C. to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $257. The month of November is another great option to travel to Ottawa, with average flight prices from Washington, D.C. averaging around $309.

What is the cheapest day to depart on your flight to Ottawa?

The cheapest day to depart from Washington, D.C. to Ottawa is on a Saturday. Travelers who choose to depart for Ottawa on a Saturday will often find tickets for as low as $422. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Sunday is $506.

What is the cheapest time of day to depart on your flight to Ottawa?

In the morning is the cheapest time of day to fly from Washington, D.C. to Ottawa when you can find flight prices for as low as $439. Flying to Ottawa in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $658 on average. Flights to Ottawa from Washington, D.C. in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Fly from Washington, D.C. Reagan-National to Ottawa for the best Washington, D.C. - Ottawa flight prices

How far in advance should I book a flight to Ottawa?

You are more likely to see cheaper flights to Ottawa from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around $410 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from Washington, D.C. for as low as $189 on momondo.

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

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

You could potentially save up to 13% on your flight if you consider stops on a Washington, D.C. to Ottawa flight.

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

As of August 2025, prices for Washington, D.C. to Ottawa flights are approximately 12% cheaper when compared to flights at the same time last year.

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

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

Cheap Washington, D.C. to Ottawa (WAS to YOW) flight deals and tips

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

Best Price Found

$198

Fastest flight time

1h 31m

Direct flights

Every day

Airports in Ottawa

1 airport
The best one-way flight to Ottawa from Washington, D.C. in the past 72 hours is $198. The best round-trip flight deal from Washington, D.C. to Ottawa found on momondo in the last 72 hours is $388.
The fastest flight from Washington, D.C. to Ottawa takes 1h 31m
Direct flights go from Washington, D.C. to Ottawa every day.
There is 1 airport near Ottawa: Ottawa (YOW)
Search flight deals

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

    The straight-line distance from Washington, D.C. to Ottawa is 454.6 mi. 1h 31m is a normal flight duration for this route.

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

    Prices for flights from Washington, D.C. to Ottawa Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The required travel and health documents for your Ottawa Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ottawa Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

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

Compare and see reviews for airlines that fly from Washington, D.C. to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $174Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Porter AirlinesPriceFrom $179Free CancellationRating
8.0
349 reviews
Search Porter Airlines flights
United AirlinesPriceFrom $209Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights

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

    The lowest priced United Airlines flight from Washington, D.C. to Ottawa from the last 72 hours was $209. Generally, United Airlines has 27 flights on this route every week with an average price of $485. United Airlines is rated 7.4/10 by our users.

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

    Across 10,000 Air Canada reviews on momondo, the average score is 7.1/10. Air Canada flies from Washington, D.C. to Ottawa about 27 times each week, with ticket deals ranging from $174 to $456. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Smiths Falls
Calabogie
Brockville
Pembroke
Petawawa
Perth
Prescott
Winchester
Wakefield

Why use momondo?

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

It is quick and easy to find Washington, D.C. to Ottawa flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ottawa that suits you.

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

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

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

Once you have performed a search for Washington, D.C. to Ottawa 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 Washington, D.C. to Ottawa right now. Can momondo alert me if prices change?

Price alerts on flights to Ottawa from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Ottawa trip

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