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Cheap flights from Ottawa to Washington, D.C. from C$ 186

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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Ottawa to Washington, D.C. are usually found in March or April, booked 51 days in advance, depart on a Friday or Tuesday and return on a Saturday

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

Enter your travel dates to find the best prices.

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 4 December 2025.

Fri 19/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Wed 7/111:35 a.m.IAD - YOW
1 stop3h 29mPorter Airlines
Deal found 4/12C$ 380
Fri 26/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Wed 7/111:35 a.m.IAD - YOW
1 stop3h 29mPorter Airlines
Deal found 4/12C$ 389
Fri 19/127:27 p.m.YOW - IAD
Nonstop1h 58mUnited Airlines
Fri 9/110:10 p.m.IAD - YOW
Nonstop1h 44mUnited Airlines
Deal found 4/12C$ 392
Thu 25/126:05 p.m.YOW - DCA
1 stop4h 30mAir Canada
Wed 31/126:00 a.m.DCA - YOW
1 stop5h 20mAir Canada
Deal found 4/12C$ 394
Fri 19/122:15 p.m.YOW - IAD
Nonstop1h 58mUnited Airlines
Wed 24/1210:08 p.m.IAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 4/12C$ 403
Sat 20/125:59 p.m.YOW - IAD
1 stop5h 07mUnited Airlines
Fri 9/110:10 p.m.IAD - YOW
Nonstop1h 44mUnited Airlines
Deal found 4/12C$ 413
Tue 23/1212:10 p.m.YOW - IAD
1 stop5h 04mPorter Airlines
Thu 8/111:35 a.m.IAD - YOW
1 stop3h 29mPorter Airlines
Deal found 4/12C$ 417
Wed 24/122:15 p.m.YOW - IAD
Nonstop1h 58mUnited Airlines
Fri 2/110:08 p.m.IAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 3/12C$ 421
Sat 20/125:59 p.m.YOW - IAD
1 stop5h 07mUnited Airlines
Wed 24/1210:08 p.m.IAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 4/12C$ 424
Sun 21/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Mon 5/111:35 a.m.IAD - YOW
1 stop5h 54mPorter Airlines
Deal found 4/12C$ 428
Fri 19/1210:20 a.m.YOW - DCA
1 stop7h 45mAir Canada
Thu 25/126:50 p.m.DCA - YOW
1 stop4h 18mAir Canada
Deal found 4/12C$ 438
Mon 15/1210:50 a.m.YOW - DCA
1 stop4h 41mAir Canada
Tue 16/126:00 a.m.DCA - YOW
1 stop5h 20mAir Canada
Deal found 1/12C$ 442

Find 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 4 December 2025.

Round-trip from

C$ 314

One-way from

C$ 186

Popular in

November

Cheapest in

March

Average price

C$ 468

Good round-trip deal

C$ 544 or less

Good one-way deal

C$ 284 or less
8/1-12/1
  • 8/1-12/1
  • 2 total stops
  • 49h 52m total
  • Ottawa to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 18/1
  • Nonstop
  • 1h 49m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ottawa to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Ottawa to Washington, D.C. (WAS).
Search Deals

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 4 December 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

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Thu 8/1

7:00 a.m.-11:44 p.m.

1 stop16h 44m

Baltimore/Washington

Mon 12/1

1:02 p.m.-5:13 p.m.

1 stop28h 11m

C$ 366

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 8/1

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

Nonstop1h 49m

Washington, D.C. Reagan-National

Mon 12/1

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

1 stop3h 42m

C$ 374

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 16/1

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

Nonstop1h 49m

Washington, D.C. Reagan-National

Fri 23/1

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

1 stop3h 42m

C$ 380

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 23/2

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

Nonstop1h 49m

Washington, D.C. Reagan-National

Thu 12/3

12:55 p.m.-2:30 p.m.

Nonstop1h 35m

C$ 381

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 24/12

9:45 a.m.-11:47 a.m.

Nonstop2h 02m

Washington, D.C. Dulles Intl

Mon 5/1

10:08 p.m.-11:54 p.m.

Nonstop1h 46m

C$ 392

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 24/12

9:45 a.m.-11:47 a.m.

Nonstop2h 02m

Washington, D.C. Dulles Intl

Fri 9/1

10:10 p.m.-11:54 p.m.

Nonstop1h 44m

C$ 392

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 19/12

7:27 p.m.-9:25 p.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Wed 7/1

12:43 p.m.-2:27 p.m.

Nonstop1h 44m

C$ 392

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 25/12

6:05 p.m.-10:35 p.m.

1 stop4h 30m

Washington, D.C. Reagan-National

Wed 31/12

6:00 a.m.-11:20 a.m.

1 stop5h 20m

C$ 394

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 8/1

2:15 p.m.-4:13 p.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Mon 12/1

5:38 p.m.-9:56 p.m.

1 stop4h 18m

C$ 395

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 2/1

6:50 a.m.-10:19 a.m.

1 stop3h 29m

Washington, D.C. Dulles Intl

Fri 9/1

8:40 a.m.-5:13 p.m.

1 stop8h 33m

C$ 396

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/12

Showing 1-10 of 45 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 28 November 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 51 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, April is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 102). Flying from Ottawa to Washington, D.C. in January is currently the most expensive (average of C$ 338). 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 4 December 2025.

It’s typically best to fly out from Ottawa to Washington, D.C. in the afternoon. Doing so could potentially save you 34% 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. Monday 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 4 December 2025.

The most flights from YOW to WAS are scheduled on a Monday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Ottawa to Washington, D.C.?

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 99% 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$ 428.

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 49m.

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 4 December 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
394 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
394 reviews
Porter Airlines
8.0
Very good
394 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,063 reviews
Porter Airlines
8.0
Very good
394 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,500 reviews
Porter Airlines
8.0
Very good
394 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 8 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 United Airlines fly from Ottawa to Washington, D.C. in about 1h 49m. The time it takes to get you to your destination is usually consistent. The distance between Ottawa and Washington, D.C. is about 727 km. Most flights are nonstop.

  • 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$ 239. Additional round-trip tickets that might be worth considering are offered by Air Canada and Porter Airlines, with the lowest prices starting at C$ 316 and C$ 361, respectively. These flights start at 50% 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 Avianca (85%), Republic Airways (78%) and United Airlines (73%).

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

    The cheapest flight price from Ottawa to Washington, D.C. is C$ 244. On average you can expect to pay C$ 1,184. The most popular route, (Ottawa - Washington, D.C. Dulles Intl), can usually be booked for C$ 297.

  • 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, April is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 102). Flying from Ottawa to Washington, D.C. in January is currently the most expensive (average of C$ 338). 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
Silver Spring
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Herndon
Arlington
Manassas
Fredericksburg
Alexandria
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 4 December 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 307AverageC$ 677FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 336AverageC$ 387FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 370AverageC$ 545FlexibilityNo 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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