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Cheap flights from Ottawa to Washington, D.C. from $167

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 9/21. 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. (YOW-WAS)

Cheap round-trip flights

Porter Airlines Logo
8:35 am - 3:06 pmYOW-IAD
6h 31m1 stop
Porter Airlines Logo
4:20 pm - 8:34 pmIAD-YOW
4h 14m1 stop
$258Porter Airlines
Find Deal
Thu, Oct 9 - Wed, Oct 15
United Airlines Logo
5:50 pm - 10:39 pmYOW-IAD
4h 49m1 stop
United Airlines Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$275United Airlines
Find Deal
Mon, Sep 22 - Tue, Sep 23
Air Canada Logo
6:00 am - 10:20 amYOW-DCA
4h 20m1 stop
Air Canada Logo
12:55 pm - 2:26 pmDCA-YOW
1h 31mnonstop
$282Air Canada
Find Deal
Thu, Oct 9 - Thu, Oct 16
Air Canada Logo
10:25 am - 12:08 pmYOW-DCA
1h 43mnonstop
Air Canada Logo
12:55 pm - 2:26 pmDCA-YOW
1h 31mnonstop
$284Air Canada
Find Deal
Sun, Sep 21 - Tue, Sep 23
Porter Airlines Logo
8:35 am - 3:06 pmYOW-IAD
6h 31m1 stop
Porter Airlines Logo
11:35 am - 4:34 pmIAD-YOW
4h 59m1 stop
$291Porter Airlines
Find Deal
Thu, Sep 18 - Sun, Sep 21
United Airlines Logo
9:50 am - 11:33 amYOW-IAD
1h 43mnonstop
United Airlines Logo
10:40 pm - 11:45 amIAD-YOW
13h 05m2 stops
$303United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 7
Lufthansa Logo
9:50 am - 11:33 amYOW-IAD
1h 43mnonstop
Lufthansa Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$353Lufthansa
Find Deal
Thu, Sep 18 - Sun, Sep 21
Lufthansa Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
Lufthansa Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$367Lufthansa
Find Deal
Thu, Oct 9 - Thu, Oct 16
WestJet Logo
5:55 am - 6:59 pmYOW-DCA
13h 04m2 stops
WestJet Logo
1:40 pm - 12:22 amDCA-YOW
10h 42m2 stops
$583WestJet
Find Deal
Fri, Sep 19 - Mon, Sep 22
WestJet Logo
5:55 am - 6:59 pmYOW-DCA
13h 04m2 stops
WestJet Logo
1:40 pm - 12:22 amDCA-YOW
10h 42m2 stops
$584WestJet
Find Deal
Fri, Sep 19 - Mon, Sep 22

Lufthansa flights from Ottawa to Washington, D.C.

Our best Lufthansa deals on Ottawa to Washington, D.C. flight tickets
Lufthansa
Sep 18
YOW9:50 amOttawa
1h 43m
IAD11:33 amWashington, D.C. Dulles Intl
Sep 21
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$353
Find similar
Lufthansa
Oct 9
YOW7:29 pmOttawa
1h 43m
IAD9:12 pmWashington, D.C. Dulles Intl
Oct 16
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$367
Find similar
Lufthansa
Oct 7
YOW9:50 amOttawa
1h 43m
IAD11:33 amWashington, D.C. Dulles Intl
Oct 7
IAD5:13 pmWashington, D.C. Dulles Intl
1h 39m
YOW6:52 pmOttawa
$405
Find similar

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

Our best United Airlines deals on Ottawa to Washington, D.C. flight tickets
United Airlines
Sep 22
YOW5:50 pmOttawa
4h 49m
1 stop
IAD10:39 pmWashington, D.C. Dulles Intl
Sep 23
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$275
Find similar
United Airlines
Oct 7
YOW9:50 amOttawa
1h 43m
IAD11:33 amWashington, D.C. Dulles Intl
Oct 7
IAD10:40 pmWashington, D.C. Dulles Intl
13h 05m
2 stops
YOW11:45 amOttawa
$303
Find similar
United Airlines
Sep 20
YOW2:45 pmOttawa
1h 43m
IAD4:28 pmWashington, D.C. Dulles Intl
Sep 27
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$347
Find similar

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 26, 2025.
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

Thu 10/9

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Wed 10/15

4:20 pm-8:34 pm

1 stop4h 14m

$258

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 9/22

5:50 pm-10:39 pm

1 stop4h 49m

Washington, D.C. Dulles Intl

Tue 9/23

8:16 am-9:58 am

Nonstop1h 42m

$275

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 10/9

6:00 am-10:20 am

1 stop4h 20m

Washington, D.C. Reagan-National

Thu 10/16

12:55 pm-2:26 pm

Nonstop1h 31m

$282

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sun 9/21

10:25 am-12:08 pm

Nonstop1h 43m

Washington, D.C. Reagan-National

Tue 9/23

12:55 pm-2:26 pm

Nonstop1h 31m

$284

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 9/18

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Sun 9/21

11:35 am-4:34 pm

1 stop4h 59m

$291

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 10/7

9:50 am-11:33 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Tue 10/7

10:40 pm-11:45 am

2 stops13h 05m

$303

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 9/18

9:50 am-11:33 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 9/21

8:16 am-9:58 am

Nonstop1h 42m

$353

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/9

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Thu 10/16

8:16 am-9:58 am

Nonstop1h 42m

$367

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 9/19

5:55 am-6:59 pm

2 stops13h 04m

Washington, D.C. Reagan-National

Mon 9/22

1:40 pm-12:22 am

2 stops10h 42m

$583

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 9/19

5:55 am-6:59 pm

2 stops13h 04m

Washington, D.C. Reagan-National

Mon 9/22

1:40 pm-12:22 am

2 stops10h 42m

$584

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 $293. If you’re not able to fly to Washington, D.C. in March, then April is your next best option. Flight prices from Ottawa to Washington, D.C. during April average around $301.

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 $545. 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 $672.

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

In the afternoon is the cheapest time of day to fly from Ottawa to Washington, D.C. when you can find flight prices for as low as $328. Flying to Washington, D.C. in the afternoon 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 $702. 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

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $375 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Ottawa for as low as $250 on momondo.

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 13% 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 August 2025, prices for Ottawa to Washington, D.C. flights are approximately 12% 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

$201

Fastest flight time

1h 38m

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 $201. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is $304.
The fastest flight from Ottawa to Washington, D.C. takes 1h 38m
Direct flights go from Ottawa to Washington, D.C. every day.
There are 2 airports near Washington, D.C.: 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 43m.

  • 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
Porter AirlinesPriceFrom $197Free CancellationRating
7.9
346 reviews
Search Porter Airlines flights
Air CanadaPriceFrom $280Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $281Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights

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

    Across 27 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. 8,943 users have rated United Airlines on momondo, with an average score of 7.4/10.

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

    $280 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 $443, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 10,000 user reviews) flies into Washington, D.C. from Ottawa 27 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
Gettysburg
Arlington
National Harbor
Woodbridge
Waldorf
Tysons
Laurel
Silver Spring
Colonial Beach
Fredericksburg
Towson
Manassas
Rockville
Gaithersburg
Reston
Fairfax
Glen Burnie
Springfield
Linthicum Heights

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