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Cheap flights from Washington to Ottawa from C$ 204

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
5 Sep — 12 Sep1
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 6 August 2026.

Wed 9/97:35 p.m. -
1 stop7h 00m
Sat 19/912:25 p.m. -
2 stops9h 20m
Deal found 2/8C$ 501
Mon 21/97:35 p.m. -
1 stop7h 00m
Tue 13/108:15 p.m. -
1 stop16h 25m
Deal found 2/8C$ 531
Sat 29/87:35 p.m. -
1 stop7h 00m
Sat 5/912:25 p.m. -
2 stops11h 35m
Deal found 1/8C$ 546
Tue 15/910:30 a.m. -
1 stop16h 05m
Tue 22/91:20 p.m. -
1 stop8h 25m
Deal found 1/8C$ 563
Sat 15/87:35 p.m. -
1 stop7h 00m
Sat 22/812:25 p.m. -
2 stops9h 20m
Deal found 1/8C$ 565
Sun 30/87:00 a.m. -
1 stop7h 15m
Sun 6/912:25 p.m. -
2 stops11h 35m
Deal found 2/8C$ 567
Tue 15/910:30 a.m. -
1 stop16h 05m
Sat 26/91:20 p.m. -
1 stop8h 25m
Deal found 1/8C$ 572
Tue 15/98:15 p.m. -
2 stops30h 20m
Tue 22/91:20 p.m. -
1 stop8h 25m
Deal found 1/8C$ 576
Fri 21/87:00 a.m. -
1 stop7h 15m
Thu 10/912:25 p.m. -
2 stops9h 20m
Deal found 2/8C$ 583
Fri 28/86:17 p.m. -
2 stops27h 23m
Sat 5/97:20 a.m. -
1 stop9h 30m
Deal found 2/8C$ 691
Sun 13/97:45 p.m. -
3 stops30h 50m
Sun 20/92:00 p.m. -
3 stops22h 31m
Deal found 5/8C$ 701
Fri 28/81:03 p.m. -
2 stops21h 56m
Sat 5/96:00 a.m. -
2 stops11h 51m
Deal found 2/8C$ 709

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 6 August 2026.

Round-trip from

C$ 501

One-way from

C$ 204

Popular in

July

Cheapest in

April

Average price

C$ 886
WestJet
  • WestJet
  • 9/9-19/9
  • 3 total stops
  • 16h 20m total
  • Washington to Ottawa
Search Deals
WestJet
  • WestJet
  • 1/10
  • 1 total stop
  • 7h 00m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 253 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 6 August 2026.
Use the filters below to find and compare flights from Washington to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Tue 15/9

10:30 a.m.-5:35 a.m.

1 stop16h 05m

Ottawa

Sat 26/9

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 572

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Wed 23/9

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Sun 27/9

4:15 p.m.-9:40 a.m.

1 stop20h 25m

C$ 572

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Sun 30/8

7:00 a.m.-5:15 p.m.

1 stop7h 15m

Ottawa

Sun 6/9

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 608
Quickest round-trip

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Fri 9/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Mon 12/10

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 618

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Fri 9/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Mon 12/10

12:25 p.m.-10:00 a.m.

2 stops24h 35m

C$ 640

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Fri 4/9

7:00 a.m.-5:15 p.m.

1 stop7h 15m

Ottawa

Mon 7/9

7:20 a.m.-9:40 a.m.

1 stop29h 20m

C$ 645

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Thu 24/9

7:35 p.m.-12:30 p.m.

2 stops13h 55m

Ottawa

Sun 27/9

6:15 p.m.-9:40 a.m.

2 stops18h 25m

C$ 684

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Thu 10/9

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Sat 19/9

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 691

PortlandOttawa

PDX Portland - YOW Ottawa

PDXYOW

Portland

Sun 13/9

7:45 p.m.-5:35 a.m.

3 stops30h 50m

Ottawa

Sun 20/9

2:00 p.m.-9:31 a.m.

3 stops22h 31m

C$ 701

PortlandOttawa

PDX Portland - YOW Ottawa

PDXYOW

Portland

Fri 28/8

1:03 p.m.-1:59 p.m.

2 stops21h 56m

Ottawa

Sat 5/9

6:00 a.m.-2:51 p.m.

2 stops11h 51m

C$ 709

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

Showing 1-10 of 33 resultsSorted by cheapest first
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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

How much does it cost to fly round-trip from State of Washington to Ottawa?

Airfare is below average for this route at the moment.
State of Washington to Ottawa flights typically cost between C$ 626 and C$ 1,160 in September.
The cheapest round-trip price found within the last 5 days was C$ 501 on WestJet (9 Sep-19 Sep).

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, Air Canada, and United Airlines can get you from State of Washington to Ottawa in just under 10h 05m. Your travel time can differ by up to 11h 51m. State of Washington and Ottawa are separated by a distance of 3605 km. This flight may include one or multiple stops.

  • 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.

See more FAQs

Travelling to a place near Ottawa?

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

Browse thousands of different options on Cheapflights for your next trip

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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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