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Cheap flights from Washington to Ottawa from C$ 156

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 29 January 2026.

Thu 16/43:10 p.m.
SEA
-
YOW
2 stops24h 13m
WestJet
Sun 19/45:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Deal found 28/1C$ 415
Wed 25/23:10 p.m.
SEA
-
YOW
1 stop22h 43m
WestJet
Wed 4/35:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Deal found 28/1C$ 425
Mon 9/33:10 p.m.
SEA
-
YOW
1 stop22h 43m
WestJet
Mon 16/35:45 p.m.
YOW
-
SEA
1 stop23h 34m
WestJet
Deal found 28/1C$ 426
Thu 9/43:10 p.m.
SEA
-
YOW
2 stops24h 13m
WestJet
Sun 12/48:20 p.m.
YOW
-
SEA
1 stop20h 59m
WestJet
Deal found 28/1C$ 436
Tue 3/311:08 p.m.
SEA
-
YOW
1 stop12h 36m
Multiple Airlines
Thu 5/35:40 a.m.
YOW
-
SEA
2 stops11h 39m
Multiple Airlines
Deal found 26/1C$ 438
Fri 13/35:40 a.m.
SEA
-
YOW
1 stop7h 05m
Air Canada
Fri 20/35:50 p.m.
YOW
-
SEA
1 stop8h 06m
Air Canada
Deal found 27/1C$ 481
Sun 3/52:30 p.m.
PDX
-
YOW
1 stop21h 55m
Multiple Airlines
Mon 11/51:20 p.m.
YOW
-
PDX
2 stops23h 11m
Multiple Airlines
Deal found 28/1C$ 691
Fri 13/36:00 a.m.
PDX
-
YOW
2 stops15h 39m
Multiple Airlines
Fri 20/34:40 p.m.
YOW
-
PDX
1 stop19h 43m
Multiple Airlines
Deal found 27/1C$ 701
Sun 3/52:30 p.m.
PDX
-
YOW
1 stop21h 55m
WestJet
Mon 11/57:30 a.m.
YOW
-
PDX
1 stop9h 20m
WestJet
Deal found 28/1C$ 709
Sat 13/62:30 p.m.
PDX
-
YOW
2 stops19h 00m
WestJet
Tue 23/66:00 a.m.
YOW
-
PDX
1 stop10h 20m
WestJet
Deal found 27/1C$ 722
Tue 18/82:00 p.m.
PDX
-
YOW
1 stop13h 55m
Multiple Airlines
Sun 23/87:00 a.m.
YOW
-
PDX
2 stops12h 52m
Multiple Airlines
Deal found 27/1C$ 821
Tue 18/82:00 p.m.
PDX
-
YOW
1 stop7h 40m
WestJet
Sun 23/87:45 a.m.
YOW
-
PDX
1 stop8h 35m
WestJet
Deal found 27/1C$ 840

Find flight deals from Washington to Ottawa

Keep the following information in mind while searching for Washington to Ottawa flight deals. Data was last updated 29 January 2026.

Round-trip from

C$ 415

One-way from

C$ 156

Popular in

December

Cheapest in

October

Average price

C$ 732
WestJet
  • WestJet
  • 16/4-19/4
  • 4 total stops
  • 35h 52m total
  • Washington to Ottawa
Search Deals
WestJet
  • WestJet
  • 30/5
  • 1 total stop
  • 7h 05m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 29 January 2026.
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

Thu 16/4

3:10 p.m.-6:23 p.m.

2 stops24h 13m

Ottawa

Sun 19/4

5:40 a.m.-2:19 p.m.

2 stops11h 39m

C$ 415

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 25/2

3:10 p.m.-4:53 p.m.

1 stop22h 43m

Ottawa

Wed 4/3

5:40 a.m.-2:19 p.m.

2 stops11h 39m

C$ 425

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/3

3:10 p.m.-4:53 p.m.

1 stop22h 43m

Ottawa

Mon 16/3

5:45 p.m.-2:19 p.m.

1 stop23h 34m

C$ 426

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 9/4

3:10 p.m.-4:53 p.m.

1 stop22h 43m

Ottawa

Sun 12/4

5:45 p.m.-2:19 p.m.

1 stop23h 34m

C$ 458

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 13/3

5:40 a.m.-3:45 p.m.

1 stop7h 05m

Ottawa

Fri 20/3

2:05 p.m.-10:56 p.m.

2 stops11h 51m

C$ 487

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 3/3

11:08 p.m.-2:44 p.m.

1 stop12h 36m

Ottawa

Thu 5/3

5:40 a.m.-7:18 p.m.

1 stop16h 38m

C$ 500

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 28/2

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

1 stop6h 55m

Ottawa

Tue 31/3

6:00 p.m.-11:03 p.m.

1 stop8h 03m

C$ 553

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 4/3

8:00 p.m.-6:43 a.m.

1 stop7h 43m

Ottawa

Sun 8/3

5:50 p.m.-10:57 p.m.

1 stop8h 07m

C$ 553

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Sun 3/5

2:30 p.m.-3:25 p.m.

1 stop21h 55m

Ottawa

Mon 11/5

1:20 p.m.-9:31 a.m.

2 stops23h 11m

C$ 691

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Fri 13/3

6:00 a.m.-12:39 a.m.

2 stops15h 39m

Ottawa

Fri 20/3

4:40 p.m.-9:23 a.m.

1 stop19h 43m

C$ 701

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 20 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$ 276). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 749). 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.

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?

    WestJet can get you from State of Washington to Ottawa in just under 24h 13m. Your travel time can differ by up to . State of Washington and Ottawa are separated by a distance of 3529 km.

  • 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$ 276). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 749). 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
Pembroke
Wakefield

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Alternative routes for Washington to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from Washington to Ottawa?

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Can Cheapflights find flights from Washington to Ottawa with no change fees?

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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