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Cheap flights from Ottawa to Washington, D.C. from C$ 231

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
25 Aug — 1 Sep1
1 adult

Cheapflights Tip: The best prices from Ottawa to Washington, D.C. are usually found in March or April, booked 58 days in advance, depart on a Friday or Tuesday and return on a Tuesday

Cheap flight deals from Ottawa to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 August 2025.

Round-trip from

C$ 382

One-way from

C$ 231

Popular in

October

Cheapest in

March

Average price

C$ 470

Good round-trip deal

C$ 544 or less

Good one-way deal

C$ 365 or less
Air Canada
  • Air Canada
  • 15/10-18/10
  • 2 total stops
  • 8h 57m total
  • Ottawa to Washington, D.C.
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Air Canada
  • Air Canada
  • 12/10
  • Nonstop
  • 1h 43m total
  • Ottawa to Washington, D.C.
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Highest demand for flights based on searches. 11% potential increase in price (C$ 88 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Ottawa to Washington, D.C. (WAS).
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Price to beat on a one-way flight from Ottawa to Washington, D.C. (WAS).
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Find flight deals from Ottawa to Washington, D.C.

Cheapest flights from Ottawa to Washington, D.C.
Explore the most affordable flight options available from Ottawa to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2025.

Wed 15/1011:05 a.m.YOW - DCA
1 stop4h 46mAir Canada
Sat 18/109:40 a.m.DCA - YOW
1 stop4h 11mAir Canada
Deal found 20/8C$ 382
Wed 15/106:00 a.m.YOW - DCA
1 stop4h 20mAir Canada
Wed 15/1012:55 p.m.DCA - YOW
Nonstop1h 31mAir Canada
Deal found 20/8C$ 389
Thu 2/106:00 a.m.YOW - DCA
1 stop4h 20mAir Canada
Sun 5/106:00 a.m.DCA - YOW
1 stop4h 28mAir Canada
Deal found 19/8C$ 391
Thu 2/1011:05 a.m.YOW - DCA
1 stop4h 46mAir Canada
Thu 9/106:59 a.m.DCA - YOW
1 stop4h 05mAir Canada
Deal found 18/8C$ 394
Thu 11/99:35 a.m.YOW - IAD
1 stop5h 31mPorter Airlines
Sun 14/94:20 p.m.IAD - YOW
1 stop3h 39mPorter Airlines
Deal found 19/8C$ 397
Thu 27/1110:30 a.m.YOW - DCA
Nonstop1h 49mAir Canada
Sun 30/116:00 a.m.DCA - YOW
1 stop3h 42mAir Canada
Deal found 18/8C$ 401
Thu 2/109:35 a.m.YOW - IAD
1 stop5h 31mPorter Airlines
Thu 9/1011:35 a.m.IAD - YOW
1 stop4h 59mPorter Airlines
Deal found 18/8C$ 404
Mon 15/99:35 a.m.YOW - IAD
1 stop5h 31mPorter Airlines
Fri 19/911:35 a.m.IAD - YOW
1 stop4h 59mPorter Airlines
Deal found 19/8C$ 407
Thu 25/99:35 a.m.YOW - IAD
1 stop5h 31mPorter Airlines
Mon 29/94:20 p.m.IAD - YOW
1 stop4h 14mPorter Airlines
Deal found 19/8C$ 408
Sat 22/1110:50 a.m.YOW - DCA
1 stop4h 41mAir Canada
Sun 30/116:00 a.m.DCA - YOW
1 stop3h 42mAir Canada
Deal found 18/8C$ 408
Mon 8/97:29 p.m.YOW - IAD
Nonstop1h 43mUnited Airlines
Tue 9/98:20 a.m.IAD - YOW
2 stops8h 23mUnited Airlines
Deal found 19/8C$ 412
Sat 22/112:50 p.m.YOW - IAD
1 stop6h 09mAir Canada
Sun 30/119:00 a.m.IAD - YOW
1 stop4h 18mAir Canada
Deal found 18/8C$ 418

Cheapflights 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, Cheapflights users made 629,999 searches. Data last updated 20 August 2025.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. that are best for you.

Fly from

Ottawa

Fly to

Washington, D.C.

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Wed 15/10

11:05 a.m.-3:51 p.m.

1 stop4h 46m

Washington, D.C. Reagan-National

Sat 18/10

9:40 a.m.-1:51 p.m.

1 stop4h 11m

C$ 382

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Wed 15/10

6:00 a.m.-10:20 a.m.

1 stop4h 20m

Washington, D.C. Reagan-National

Wed 15/10

12:55 p.m.-2:26 p.m.

Nonstop1h 31m

C$ 389

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 2/10

6:00 a.m.-10:20 a.m.

1 stop4h 20m

Washington, D.C. Reagan-National

Thu 9/10

12:55 p.m.-2:26 p.m.

Nonstop1h 31m

C$ 391

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 2/10

6:00 a.m.-10:20 a.m.

1 stop4h 20m

Washington, D.C. Reagan-National

Sun 5/10

6:00 a.m.-10:28 a.m.

1 stop4h 28m

C$ 391

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 11/9

9:35 a.m.-3:06 p.m.

1 stop5h 31m

Washington, D.C. Dulles Intl

Sun 14/9

4:20 p.m.-7:59 p.m.

1 stop3h 39m

C$ 397

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 27/11

10:30 a.m.-12:19 p.m.

Nonstop1h 49m

Washington, D.C. Reagan-National

Sun 30/11

6:00 a.m.-9:42 a.m.

1 stop3h 42m

C$ 401

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/10

9:35 a.m.-3:06 p.m.

1 stop5h 31m

Washington, D.C. Dulles Intl

Thu 9/10

11:35 a.m.-4:34 p.m.

1 stop4h 59m

C$ 404

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 24/9

9:35 a.m.-3:06 p.m.

1 stop5h 31m

Washington, D.C. Dulles Intl

Sun 28/9

4:20 p.m.-7:59 p.m.

1 stop3h 39m

C$ 405

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 15/9

9:35 a.m.-3:06 p.m.

1 stop5h 31m

Washington, D.C. Dulles Intl

Fri 19/9

11:35 a.m.-4:34 p.m.

1 stop4h 59m

C$ 407

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 25/9

9:35 a.m.-3:06 p.m.

1 stop5h 31m

Washington, D.C. Dulles Intl

Mon 29/9

4:20 p.m.-8:34 p.m.

1 stop4h 14m

C$ 408

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/8

Showing 1-10 of 46 results
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Best time to book a flight from Ottawa to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Washington, D.C.

How far ahead should I book a flight from Ottawa to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Washington, D.C.. Price data was last updated on 8 August 2025.

To ensure you get the cheapest price possible for a flight from Ottawa to Washington, D.C., you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Ottawa to Washington, D.C.?

Currently, February is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 256). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 352). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to WAS?

Find hourly flight availability from Ottawa to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 August 2025.

It’s typically best to fly out from Ottawa to Washington, D.C. in the afternoon. Doing so could potentially save you 61% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Ottawa to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to Washington, D.C.. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Ottawa to Washington, D.C. flight should consider departing on Saturday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ottawa to Washington, D.C.

Explore weekly flight availability from Ottawa to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 20 August 2025.

The most flights from YOW to WAS are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

What’s the top layover airport for flights from Ottawa to Washington, D.C.?

Share of one-stop round-trip flights from Ottawa to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YTZ) – chosen by Cheapflights users on 98% of one-stop itineraries from Ottawa to Washington, D.C. on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to Washington, D.C.?

Average round-trip fare for 1-stop flights from Ottawa to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 425.

What’s the fastest layover option from Ottawa to Washington, D.C.?

Shortest average travel time for 1-stop one-way flights from Ottawa to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YTZ) have the shortest average one-way travel time for 1-stop routes: 3h 53m.

Which airport typically offers the quickest layover for flights from Ottawa to Washington, D.C.?

Average layover duration for 1-stop one-way flights from Ottawa to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 06m.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 20 August 2025.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from Ottawa to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
339 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
339 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,928 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to Washington, D.C.?

    For a flight from Ottawa to Washington, D.C., you will be flying from Ottawa. Ottawa (YOW) is just 10.6 km from the centre of the city. Ottawa is the only Ottawa airport and it handles 7 outbound flights to Washington, D.C. per day. 3 airlines have flights to Washington, D.C. from Ottawa on a regular basis.

  • How long is the flight from Ottawa to Washington, D.C.?

    Airlines like Air Canada and Porter Airlines fly from Ottawa to Washington, D.C. in about 4h 46m. The time it takes to get you to your destination can typically vary by up to 45m. The distance between Ottawa and Washington, D.C. is about 727 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Ottawa to Washington, D.C. round-trip?

    Flying on United Airlines is currently your cheapest option to Washington, D.C., with prices starting at C$ 335. Additional round-trip tickets that might be worth considering are offered by Air Canada and Porter Airlines, with the lowest prices starting at C$ 341 and C$ 354, respectively. These flights start at 30% lower than the current average price 3 months from now.

  • What are the most popular routes from Ottawa to Washington, D.C.?

    The most popular flight routes from Ottawa to Washington, D.C. are Ottawa - Washington, D.C. Dulles Intl, Ottawa - Washington, D.C. Reagan-National and Ottawa - Baltimore/Washington.

  • What are the most reliable airlines from Ottawa to Washington, D.C.?

    The top 3 most reliable airlines when flying from Ottawa to Washington, D.C. are GoJet (59%), Air Canada (59%) and United Airlines (59%).

  • What are the cheapest flights from Ottawa to Washington, D.C.?

    The cheapest flight price from Ottawa to Washington, D.C. is C$ 297. On average you can expect to pay C$ 970. The most popular route, (Ottawa - Washington, D.C. Dulles Intl), can usually be booked for C$ 397.

  • Can I find deals for flights from Ottawa to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Ottawa to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Washington, D.C..

  • Can I find deals for business class flights from Ottawa to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Ottawa to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to Washington, D.C.?

    Currently, February is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 256). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 352). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Herndon
Hanover
Reston
Fairfax
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Alexandria
Manassas
Fredericksburg
Rockville

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Ottawa to Washington, D.C.

Discover the top 3 airlines that operate flights from Ottawa to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 20 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 333AverageC$ 411FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 335AverageC$ 709FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 341AverageC$ 542FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to Washington, D.C.?

Deals for Ottawa to Washington, D.C. flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Washington, D.C.?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Washington, D.C. for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ottawa to Washington, D.C. with no change fees?

Yes, we can. To see specific flights from Ottawa to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to Washington, D.C. become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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