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Cheap flights from Washington to Ottawa from C$ 171

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Washington to Ottawa

Keep the following information in mind while searching for Washington to Ottawa flight deals. Data was last updated 15 September 2025.

Round-trip from

C$ 329

One-way from

C$ 171

Popular in

February

Cheapest in

September

Average price

C$ 554
United Airlines
  • United Airlines
  • 10/3-11/3
  • 3 total stops
  • 21h 03m total
  • Washington to Ottawa
Search Deals
United Airlines
  • United Airlines
  • 3/10
  • 1 total stop
  • 17h 46m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Washington to Ottawa

Cheapest flights from Washington to Ottawa
Explore the most affordable flight options available from Washington to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 September 2025.

Sat 11/101:50 p.m.SEA - YOW
1 stop7h 50mWestJet
Wed 15/105:55 a.m.YOW - SEA
2 stops10h 04mWestJet
Deal found 14/9C$ 365
Fri 17/108:40 a.m.SEA - YOW
2 stops12h 42mWestJet
Mon 20/105:55 a.m.YOW - SEA
2 stops10h 04mWestJet
Deal found 13/9C$ 372
Mon 29/97:37 p.m.SEA - YOW
2 stops13h 08mUnited Airlines
Tue 30/92:45 p.m.YOW - SEA
1 stop8h 59mUnited Airlines
Deal found 15/9C$ 392
Sun 12/108:40 a.m.SEA - YOW
2 stops28h 39mWestJet
Sun 19/105:55 a.m.YOW - SEA
2 stops34h 04mWestJet
Deal found 14/9C$ 394
Fri 17/108:40 a.m.SEA - YOW
2 stops12h 42mWestJet
Sun 19/105:55 a.m.YOW - SEA
2 stops34h 04mWestJet
Deal found 13/9C$ 403
Sat 11/106:00 a.m.SEA - YOW
1 stop7h 43mUnited Airlines
Wed 15/105:25 p.m.YOW - SEA
1 stop8h 05mUnited Airlines
Deal found 13/9C$ 417
Sat 11/107:40 p.m.PDX - YOW
1 stop9h 43mAir Canada
Sat 18/106:00 p.m.YOW - PDX
1 stop8h 01mAir Canada
Deal found 13/9C$ 432
Sat 11/105:15 p.m.PDX - YOW
2 stops12h 56mUnited Airlines
Sat 18/102:48 p.m.YOW - PDX
1 stop9h 38mUnited Airlines
Deal found 13/9C$ 452
Mon 6/1010:54 p.m.SEA - YOW
1 stop9h 51mUnited Airlines
Thu 9/105:15 a.m.YOW - SEA
1 stop8h 44mUnited Airlines
Deal found 15/9C$ 454
Sun 7/127:00 p.m.PDX - YOW
1 stop8h 43mAir Canada
Fri 12/127:45 a.m.YOW - PDX
1 stop10h 00mAir Canada
Deal found 13/9C$ 626
Tue 28/1011:59 p.m.PDX - YOW
1 stop7h 27mUnited Airlines
Tue 4/119:45 a.m.YOW - PDX
1 stop13h 44mUnited Airlines
Deal found 13/9C$ 647
Tue 28/1010:38 a.m.PDX - YOW
1 stop22h 57mMultiple Airlines
Tue 4/116:00 a.m.YOW - PDX
2 stops17h 50mMultiple Airlines
Deal found 13/9C$ 655

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Ottawa 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 15 September 2025.
Use the filters below to find and compare flights from Washington to Ottawa that are best for you.

Fly from

Washington

Fly to

Ottawa

Route

Depart

Return

Price

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 10/3

1:55 p.m.-10:07 a.m.

2 stops17h 12m

Ottawa

Wed 11/3

2:05 p.m.-12:51 a.m.

2 stops13h 46m

C$ 337

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 11/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

Ottawa

Wed 15/10

5:55 a.m.-12:59 p.m.

2 stops10h 04m

C$ 365

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 17/10

8:40 a.m.-12:22 a.m.

2 stops12h 42m

Ottawa

Mon 20/10

5:55 a.m.-12:59 p.m.

2 stops10h 04m

C$ 372

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 29/9

7:37 p.m.-11:45 a.m.

2 stops13h 08m

Ottawa

Tue 30/9

2:45 p.m.-8:44 p.m.

1 stop8h 59m

C$ 392

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 12/10

8:40 a.m.-4:19 p.m.

2 stops28h 39m

Ottawa

Sun 19/10

5:55 a.m.-12:59 p.m.

2 stops34h 04m

C$ 394

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Sat 11/10

7:40 p.m.-8:23 a.m.

1 stop9h 43m

Ottawa

Sat 18/10

6:00 p.m.-11:01 p.m.

1 stop8h 01m

C$ 432

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Sat 11/10

5:15 p.m.-9:11 a.m.

2 stops12h 56m

Ottawa

Sat 18/10

2:48 p.m.-9:26 p.m.

1 stop9h 38m

C$ 452

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Tue 10/3

7:00 p.m.-6:43 a.m.

1 stop8h 43m

Ottawa

Wed 11/3

9:15 a.m.-6:30 p.m.

2 stops12h 15m

C$ 604

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Tue 10/3

11:55 p.m.-10:07 a.m.

1 stop7h 12m

Ottawa

Wed 11/3

2:05 p.m.-10:08 p.m.

2 stops11h 03m

C$ 623

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Sun 7/12

7:00 p.m.-6:43 a.m.

1 stop8h 43m

Ottawa

Fri 12/12

7:45 a.m.-2:45 p.m.

1 stop10h 00m

C$ 626

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 27 results
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Best time to book a flight from Washington to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Washington 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 Washington to Ottawa

What is the cheapest month to book a flight from State of Washington to Ottawa?

Currently, October is the cheapest month in which you can book a flight from State of Washington to Ottawa (average of C$ 224). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 326). 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 WA to YOW?

Find hourly flight availability from Washington to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 September 2025.

When flying from State of Washington to Ottawa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Washington to Ottawa. 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 into for flights to Ottawa from Washington?

    Ottawa (YOW) is the airport you will fly into if you book a flight from Washington to Ottawa. It is only a 10.6 km journey from Ottawa (YOW) to Ottawa’s city centre.

  • How long is the flight from State of Washington to Ottawa?

    United Airlines, WestJet, and Air Canada can get you from State of Washington to Ottawa in just under 7h 50m. Your travel time can differ by up to 9h 22m. State of Washington and Ottawa are separated by a distance of 3529 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to Ottawa one-way?

    C$ 171 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from C$ 173 and C$ 199, respectively.

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

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

  • How can I find direct flights from Washington to Ottawa?

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

  • Can I find deals for business class flights from Washington to Ottawa?

    Yes. Cheapflights offers flight deals from Washington to Ottawa 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 State of Washington to Ottawa?

    Currently, October is the cheapest month in which you can book a flight from State of Washington to Ottawa (average of C$ 224). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 326). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Smiths Falls
Perth
Prescott
Pembroke
Wakefield

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Alternative routes for Washington to Ottawa

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How does Cheapflights help users find flights from Washington to Ottawa?

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Yes! Cheapflights helps users easily find flights from Washington to Ottawa with no change fees.

Can Cheapflights notify me if prices for flights from Washington to Ottawa become cheaper?

Yes, Cheapflights offers price alerts on Washington to Ottawa flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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