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Cheap flights from Ottawa to Washington, D.C. from $145

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 10/29. 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 - 9:22 pmYOW-IAD
1h 52mnonstop
United Airlines Logo
8:45 am - 1:32 pmIAD-YOW
4h 47m1 stop
$272United Airlines
Find Deal
Fri, Nov 14 - Sat, Nov 15
Multiple Airlines Logo
9:30 am - 8:16 pmYOW-BWI
10h 46m1 stop
Multiple Airlines Logo
8:21 pm - 5:13 pmBWI-YOW
20h 52m1 stop
$274Multiple Airlines
Find Deal
Fri, Oct 31 - Sun, Nov 2
Multiple Airlines Logo
9:30 am - 5:24 pmYOW-BWI
7h 54m1 stop
Multiple Airlines Logo
7:30 am - 5:13 pmBWI-YOW
9h 43m1 stop
$280Multiple Airlines
Find Deal
Tue, Nov 25 - Wed, Dec 3
Porter Airlines Logo
12:10 pm - 5:14 pmYOW-IAD
5h 04m1 stop
Porter Airlines Logo
6:30 pm - 10:29 pmIAD-YOW
3h 59m1 stop
$286Porter Airlines
Find Deal
Tue, Nov 4 - Thu, Nov 27
Porter Airlines Logo
6:50 am - 10:24 amYOW-IAD
3h 34m1 stop
Porter Airlines Logo
11:40 am - 5:29 pmIAD-YOW
5h 49m1 stop
$290Porter Airlines
Find Deal
Fri, Nov 7 - Mon, Nov 10
Air Canada Logo
10:50 am - 3:31 pmYOW-DCA
4h 41m1 stop
Air Canada Logo
6:00 am - 9:42 amDCA-YOW
3h 42m1 stop
$342Air Canada
Find Deal
Sat, Nov 8 - Sun, Nov 9
Air Canada Logo
10:30 am - 12:19 pmYOW-DCA
1h 49mnonstop
Air Canada Logo
6:00 am - 9:42 amDCA-YOW
3h 42m1 stop
$347Air Canada
Find Deal
Thu, Nov 6 - Sun, Nov 9
American Airlines Logo
6:45 am - 12:33 pmYOW-DCA
5h 48m1 stop
American Airlines Logo
10:04 am - 4:49 pmDCA-YOW
6h 45m1 stop
$419American Airlines
Find Deal
Wed, Nov 19 - Thu, Nov 20
American Airlines Logo
6:45 am - 8:00 pmYOW-DCA
13h 15m2 stops
American Airlines Logo
10:04 am - 4:49 pmDCA-YOW
6h 45m1 stop
$429American Airlines
Find Deal
Fri, Nov 21 - Mon, Nov 24
WestJet Logo
5:40 am - 6:59 pmYOW-DCA
13h 19m2 stops
WestJet Logo
12:39 pm - 12:42 amDCA-YOW
12h 03m2 stops
$526WestJet
Find Deal
Mon, Nov 17 - Mon, Nov 24

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

Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
Porter Airlines
Nov 4
YOW12:10 pmOttawa
5h 04m
1 stop
IAD5:14 pmWashington, D.C. Dulles Intl
Nov 27
IAD6:30 pmWashington, D.C. Dulles Intl
3h 59m
1 stop
YOW10:29 pmOttawa
$286
Find similar
Porter Airlines
Nov 7
YOW6:50 amOttawa
3h 34m
1 stop
IAD10:24 amWashington, D.C. Dulles Intl
Nov 10
IAD11:40 amWashington, D.C. Dulles Intl
5h 49m
1 stop
YOW5:29 pmOttawa
$290
Find similar
Porter Airlines
Nov 21
YOW6:50 amOttawa
3h 34m
1 stop
IAD10:24 amWashington, D.C. Dulles Intl
Nov 23
IAD11:40 amWashington, D.C. Dulles Intl
5h 49m
1 stop
YOW5:29 pmOttawa
$291
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
Nov 14
YOW7:30 pmOttawa
1h 52m
IAD9:22 pmWashington, D.C. Dulles Intl
Nov 15
IAD8:45 amWashington, D.C. Dulles Intl
4h 47m
1 stop
YOW1:32 pmOttawa
$272
Find similar
United Airlines
Nov 14
YOW7:30 pmOttawa
1h 52m
IAD9:22 pmWashington, D.C. Dulles Intl
Nov 15
IAD8:20 amWashington, D.C. Dulles Intl
8h 12m
2 stops
YOW4:32 pmOttawa
$295
Find similar
United Airlines
Nov 4
YOW7:30 pmOttawa
1h 52m
IAD9:22 pmWashington, D.C. Dulles Intl
Nov 27
IAD12:42 pmWashington, D.C. Dulles Intl
1h 45m
YOW2:27 pmOttawa
$337
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 October 16, 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

Fri 11/14

7:30 pm-9:22 pm

Nonstop1h 52m

Washington, D.C. Dulles Intl

Sat 11/15

8:45 am-1:32 pm

1 stop4h 47m

$272

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Fri 10/31

9:30 am-8:16 pm

1 stop10h 46m

Baltimore/Washington

Sun 11/2

8:21 pm-5:13 pm

1 stop20h 52m

$274

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Tue 11/25

9:30 am-5:24 pm

1 stop7h 54m

Baltimore/Washington

Wed 12/3

7:30 am-5:13 pm

1 stop9h 43m

$280

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 11/4

12:10 pm-5:14 pm

1 stop5h 04m

Washington, D.C. Dulles Intl

Thu 11/27

6:30 pm-10:29 pm

1 stop3h 59m

$286

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 11/7

6:50 am-10:24 am

1 stop3h 34m

Washington, D.C. Dulles Intl

Mon 11/10

11:40 am-5:29 pm

1 stop5h 49m

$290

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sat 11/8

10:50 am-3:31 pm

1 stop4h 41m

Washington, D.C. Reagan-National

Sun 11/9

6:00 am-9:42 am

1 stop3h 42m

$342

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 11/6

10:30 am-12:19 pm

Nonstop1h 49m

Washington, D.C. Reagan-National

Sun 11/9

6:00 am-9:42 am

1 stop3h 42m

$347

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Wed 11/19

6:45 am-12:33 pm

1 stop5h 48m

Washington, D.C. Reagan-National

Thu 11/20

10:04 am-4:49 pm

1 stop6h 45m

$419

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 11/21

6:45 am-8:00 pm

2 stops13h 15m

Washington, D.C. Reagan-National

Mon 11/24

10:04 am-4:49 pm

1 stop6h 45m

$429

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 11/17

5:40 am-6:59 pm

2 stops13h 19m

Washington, D.C. Reagan-National

Mon 11/24

12:39 pm-12:42 am

2 stops12h 03m

$526

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 Monday. momondo users have found tickets for Monday departures for as low as $521. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to Washington, D.C. for around $684.

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 $673. 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

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 $407 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 $245 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 24% 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 October 2025, prices for Ottawa to Washington, D.C. flights are approximately 62% 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

$237

Fastest flight time

1h 43m

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 $237. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is $300.
The fastest flight from Ottawa to Washington, D.C. takes 1h 43m
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 49m.

  • 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
8.0
381 reviews
Search Porter Airlines flights
United AirlinesPriceFrom $281Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights
Air CanadaPriceFrom $284Free CancellationRating
7.1
10,306 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 $465, with the best United Airlines deals starting from $281 round-trip. 8,982 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 $453, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 10,307 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
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Gaithersburg
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