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Cheap flights from Washington to Ottawa from C$ 216

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Washington to Ottawa

Enter your travel dates to find the best prices.

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 30 October 2025.

Fri 28/113:10 p.m.SEA - YOW
2 stops30h 32mWestJet
Tue 9/125:40 a.m.YOW - SEA
2 stops11h 40mWestJet
Deal found 30/10C$ 531
Thu 27/113:10 p.m.SEA - YOW
2 stops24h 11mWestJet
Thu 4/125:40 a.m.YOW - SEA
2 stops35h 40mWestJet
Deal found 30/10C$ 624
Wed 12/119:34 p.m.SEA - YOW
1 stop12h 01mMultiple Airlines
Fri 14/113:55 p.m.YOW - SEA
1 stop9h 55mMultiple Airlines
Deal found 30/10C$ 660
Wed 12/119:34 p.m.SEA - YOW
2 stops21h 55mMultiple Airlines
Sat 15/119:25 a.m.YOW - SEA
1 stop14h 21mMultiple Airlines
Deal found 30/10C$ 679
Tue 9/127:54 p.m.SEA - YOW
1 stop15h 50mMultiple Airlines
Mon 22/125:40 a.m.YOW - SEA
1 stop16h 31mMultiple Airlines
Deal found 30/10C$ 753
Thu 27/1110:05 a.m.SEA - YOW
1 stop11h 13mAir Canada
Thu 4/127:45 a.m.YOW - SEA
1 stop28h 46mAir Canada
Deal found 30/10C$ 754
Thu 27/113:10 p.m.SEA - YOW
3 stops14h 14mMultiple Airlines
Thu 4/128:55 p.m.YOW - SEA
2 stops20h 25mMultiple Airlines
Deal found 30/10C$ 755
Thu 27/119:50 a.m.PDX - YOW
1 stop11h 28mAir Canada
Wed 10/127:45 a.m.YOW - PDX
1 stop9h 55mAir Canada
Deal found 30/10C$ 758
Fri 28/118:10 a.m.SEA - YOW
1 stop7h 28mAir Canada
Tue 9/127:45 a.m.YOW - SEA
1 stop9h 46mAir Canada
Deal found 30/10C$ 795
Thu 27/112:35 p.m.PDX - YOW
2 stops31h 05mMultiple Airlines
Wed 10/129:25 a.m.YOW - PDX
1 stop14h 19mMultiple Airlines
Deal found 30/10C$ 803
Fri 21/1111:59 p.m.PDX - YOW
1 stop7h 27mAir Canada
Sun 23/117:45 a.m.YOW - PDX
1 stop13h 45mAir Canada
Deal found 29/10C$ 922
Thu 13/119:50 a.m.PDX - YOW
2 stops10h 43mAir Canada
Mon 17/115:50 p.m.YOW - PDX
1 stop18h 25mAir Canada
Deal found 29/10C$ 930

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 30 October 2025.

Round-trip from

C$ 362

One-way from

C$ 235

Popular in

February

Cheapest in

October

Average price

C$ 549
United Airlines
  • United Airlines
  • 10/3-11/3
  • 2 total stops
  • 16h 47m total
  • Washington to Ottawa
Search Deals
20/11
  • 20/11
  • 1 total stop
  • 17h 55m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 30 October 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

Wed 21/1

5:50 a.m.-3:45 p.m.

1 stop6h 55m

Ottawa

Fri 23/1

5:45 a.m.-2:31 p.m.

2 stops11h 46m

C$ 388

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 12/1

5:50 a.m.-3:45 p.m.

1 stop6h 55m

Ottawa

Sun 18/1

10:20 a.m.-10:16 p.m.

1 stop14h 56m

C$ 423

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 27/11

3:10 p.m.-6:21 p.m.

2 stops24h 11m

Ottawa

Thu 4/12

5:40 a.m.-2:20 p.m.

2 stops35h 40m

C$ 624

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 1/1

8:00 a.m.-6:26 p.m.

1 stop7h 26m

Ottawa

Sat 17/1

5:40 a.m.-9:36 a.m.

2 stops30h 56m

C$ 635

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 12/11

9:34 p.m.-12:35 p.m.

1 stop12h 01m

Ottawa

Fri 14/11

3:55 p.m.-10:50 p.m.

1 stop9h 55m

C$ 660

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 12/11

9:34 p.m.-10:29 p.m.

2 stops21h 55m

Ottawa

Sat 15/11

9:25 a.m.-8:46 p.m.

1 stop14h 21m

C$ 679

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 1/1

5:00 a.m.-11:54 p.m.

2 stops15h 54m

Ottawa

Sat 17/1

9:45 a.m.-6:28 p.m.

2 stops11h 43m

C$ 725

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 27/11

3:10 p.m.-8:24 a.m.

3 stops14h 14m

Ottawa

Thu 4/12

8:55 p.m.-2:20 p.m.

2 stops20h 25m

C$ 755

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$ 864

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Mon 23/2

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

1 stop8h 43m

Ottawa

Fri 27/2

7:45 a.m.-2:40 p.m.

1 stop9h 55m

C$ 888

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/10

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, May is the cheapest month in which you can book a flight from State of Washington to Ottawa (average of C$ 286). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 420). 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 30 October 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Ottawa at noon. If you’re flexible enough to do this you can expect to save up to 51% on your trip compared to booking a flight in the afternoon.

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?

    Air Canada and WestJet can get you from State of Washington to Ottawa in just under 6h 55m. Your travel time can differ by up to 17h 16m. 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$ 216 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from C$ 233 and C$ 353, 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, May is the cheapest month in which you can book a flight from State of Washington to Ottawa (average of C$ 286). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 420). 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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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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