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 9/26. 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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Cheap round-trip flights

Porter Airlines Logo
11:00 am - 2:56 pmYOW-IAD
3h 56m1 stop
Porter Airlines Logo
4:10 pm - 9:03 pmIAD-YOW
4h 53m1 stop
$243Porter Airlines
Find Deal
Thu, Aug 7 - Mon, Aug 11
Porter Airlines Logo
9:35 am - 2:56 pmYOW-IAD
5h 21m1 stop
Porter Airlines Logo
4:10 pm - 9:03 pmIAD-YOW
4h 53m1 stop
$247Porter Airlines
Find Deal
Thu, Aug 7 - Mon, Aug 11
Air Canada Logo
6:00 am - 10:18 amYOW-DCA
4h 18m1 stop
Air Canada Logo
6:00 am - 10:24 amDCA-YOW
4h 24m1 stop
$254Air Canada
Find Deal
Thu, Aug 7 - Mon, Aug 11
Air Canada Logo
10:25 am - 12:03 pmYOW-DCA
1h 38mnonstop
Air Canada Logo
12:55 pm - 2:27 pmDCA-YOW
1h 32mnonstop
$256Air Canada
Find Deal
Thu, Aug 7 - Mon, Aug 11
 Logo
5:15 am - 9:37 amYOW-IAD
4h 22m1 stop
 Logo
11:55 am - 5:58 pmIAD-YOW
6h 03m1 stop
Sun, Aug 24 - Sun, Aug 31
 Logo
9:35 am - 2:56 pmYOW-IAD
5h 21m1 stop
 Logo
9:33 pm - 5:06 pmIAD-YOW
19h 33m1 stop
Fri, Aug 22 - Mon, Aug 25
United Airlines Logo
7:29 pm - 9:04 pmYOW-IAD
1h 35mnonstop
United Airlines Logo
8:18 am - 9:58 amIAD-YOW
1h 40mnonstop
$345United Airlines
Find Deal
Sat, Aug 2 - Sat, Aug 9
United Airlines Logo
5:50 pm - 10:28 pmYOW-IAD
4h 38m1 stop
United Airlines Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$353United Airlines
Find Deal
Fri, Sep 26 - Sat, Sep 27
WestJet Logo
5:55 am - 11:17 pmYOW-BWI
17h 22m2 stops
WestJet Logo
5:40 am - 12:22 amBWI-YOW
18h 42m2 stops
$549WestJet
Find Deal
Wed, Aug 20 - Sun, Aug 24
WestJet Logo
5:55 am - 11:18 pmYOW-BWI
17h 23m2 stops
WestJet Logo
5:35 am - 12:22 amBWI-YOW
18h 47m2 stops
$622WestJet
Find Deal
Sat, Aug 2 - Sun, Aug 10

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

Our best United Airlines deals on Ottawa to Washington, D.C. flight tickets
United Airlines
Aug 2
YOW7:29 pmOttawa
1h 35m
IAD9:04 pmWashington, D.C. Dulles Intl
Aug 9
IAD8:18 amWashington, D.C. Dulles Intl
1h 40m
YOW9:58 amOttawa
United Airlines
Sep 26
YOW5:50 pmOttawa
4h 38m
1 stop
IAD10:28 pmWashington, D.C. Dulles Intl
Sep 27
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
United Airlines
Aug 2
YOW7:29 pmOttawa
1h 35m
IAD9:04 pmWashington, D.C. Dulles Intl
Aug 9
IAD5:25 pmWashington, D.C. Dulles Intl
4h 40m
1 stop
YOW10:05 pmOttawa

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

Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
Porter Airlines
Aug 7
YOW11:00 amOttawa
3h 56m
1 stop
IAD2:56 pmWashington, D.C. Dulles Intl
Aug 11
IAD4:10 pmWashington, D.C. Dulles Intl
4h 53m
1 stop
YOW9:03 pmOttawa
Porter Airlines
Aug 7
YOW9:35 amOttawa
5h 21m
1 stop
IAD2:56 pmWashington, D.C. Dulles Intl
Aug 11
IAD4:10 pmWashington, D.C. Dulles Intl
4h 53m
1 stop
YOW9:03 pmOttawa
Porter Airlines
Aug 20
YOW9:35 amOttawa
5h 21m
1 stop
IAD2:56 pmWashington, D.C. Dulles Intl
Aug 24
IAD11:35 amWashington, D.C. Dulles Intl
4h 58m
1 stop
YOW4:33 pmOttawa

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.?

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 $538. 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 $659.

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 $674. 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 $368 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 $277 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?

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 July 2025, prices for Ottawa to Washington, D.C. flights are approximately 4% 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

$145

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 $145. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is $243.
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 near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD)

  • 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
Porter AirlinesPriceFrom $197Free CancellationRating
8.0
303 reviews
Search Porter Airlines flights
United AirlinesPriceFrom $240Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights
Air CanadaPriceFrom $275Free CancellationRating
7.1
9,692 reviews
Search Air Canada 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 $240 round-trip. 8,846 users have rated United Airlines on momondo, with an average score of 7.4/10.

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

    $275 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 $444, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 9,692 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
Laurel
Woodbridge
Tysons
Silver Spring
Waldorf
Fredericksburg
Manassas
Gaithersburg
Rockville
Towson
Fairfax
Colonial Beach
Glen Burnie
Linthicum Heights
Reston
Springfield

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.


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1 adult
Tue 7/15
Tue 7/22

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.