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Cheap flights from Washington to Ottawa from C$ 304

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
22 Jul — 29 Jul1
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 22 June 2026.

Fri 10/77:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Fri 17/71:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 19/6C$ 618
Thu 9/77:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Thu 16/71:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 18/6C$ 620
Sat 8/87:00 a.m.
SEA
-
YOW
1 stop7h 15m
WestJet
Sat 15/81:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 19/6C$ 648
Sun 9/87:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Sat 15/81:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 19/6C$ 662
Thu 9/77:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Sat 18/77:20 a.m.
YOW
-
SEA
1 stop14h 25m
WestJet
Deal found 17/6C$ 674
Fri 10/77:00 a.m.
SEA
-
YOW
1 stop9h 20m
WestJet
Mon 13/78:15 p.m.
YOW
-
SEA
1 stop25h 30m
WestJet
Deal found 17/6C$ 676
Fri 7/810:30 a.m.
SEA
-
YOW
1 stop11h 10m
WestJet
Sat 15/81:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 19/6C$ 685
Sun 9/87:00 a.m.
SEA
-
YOW
2 stops26h 30m
WestJet
Mon 17/81:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 19/6C$ 691
Tue 21/72:30 p.m.
PDX
-
YOW
2 stops14h 35m
Multiple Airlines
Mon 27/78:15 p.m.
YOW
-
PDX
1 stop20h 35m
Multiple Airlines
Deal found 17/6C$ 705
Tue 21/72:30 p.m.
PDX
-
YOW
1 stop12h 05m
WestJet
Mon 27/74:15 p.m.
YOW
-
PDX
1 stop24h 35m
WestJet
Deal found 17/6C$ 722
Wed 29/72:30 p.m.
PDX
-
YOW
1 stop25h 50m
WestJet
Mon 3/86:25 p.m.
YOW
-
PDX
2 stops22h 25m
WestJet
Deal found 18/6C$ 729
Mon 5/107:45 p.m.
PDX
-
YOW
2 stops10h 39m
Air Canada
Wed 14/106:00 a.m.
YOW
-
PDX
2 stops11h 51m
Air Canada
Deal found 21/6C$ 733

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 22 June 2026.

Round-trip from

C$ 618

One-way from

C$ 304

Popular in

June

Cheapest in

April

Average price

C$ 1,093
WestJet
  • WestJet
  • 10/7-17/7
  • 2 total stops
  • 15h 25m total
  • Washington to Ottawa
Search Deals
WestJet
  • WestJet
  • 10/9
  • 1 total stop
  • 7h 00m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 51 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 22 June 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 - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 30/7

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

1 stop7h 00m

Ottawa

Sun 2/8

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

1 stop20h 25m

C$ 676

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 9/7

7:00 a.m.-12:30 p.m.

2 stops26h 30m

Ottawa

Thu 16/7

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

2 stops18h 25m

C$ 692

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 5/8

8:13 p.m.-2:33 p.m.

2 stops39h 20m

Ottawa

Wed 12/8

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

1 stop8h 25m

C$ 698

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 25/7

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

1 stop7h 15m

Ottawa

Sat 1/8

1:20 p.m.-9:00 p.m.

1 stop10h 40m

C$ 703

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Mon 7/9

7:45 p.m.-9:24 a.m.

2 stops10h 39m

Ottawa

Sat 12/9

10:00 a.m.-7:11 p.m.

2 stops12h 11m

C$ 739
Quickest round-trip

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 20/9

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

1 stop7h 00m

Ottawa

Tue 22/9

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

1 stop8h 25m

C$ 742

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 5/8

7:00 a.m.-12:30 p.m.

2 stops26h 30m

Ottawa

Tue 11/8

6:25 p.m.-6:45 p.m.

2 stops27h 20m

C$ 744

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Tue 18/8

2:30 p.m.-12:40 a.m.

1 stop7h 10m

Ottawa

Fri 21/8

4:15 p.m.-1:50 p.m.

1 stop24h 35m

C$ 753

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Thu 16/7

11:30 p.m.-10:03 a.m.

1 stop7h 33m

Ottawa

Mon 20/7

5:50 p.m.-9:25 a.m.

1 stop18h 35m

C$ 763

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Fri 17/7

11:30 p.m.-6:48 p.m.

1 stop16h 18m

Ottawa

Fri 24/7

6:25 a.m.-11:38 a.m.

1 stop8h 13m

C$ 763

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/6

Showing 1-10 of 27 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?

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 7h. Your travel time can differ by up to 3h 39m. State of Washington and Ottawa are separated by a distance of 3529 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
Brockville
Wakefield
Pembroke
Smiths Falls

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Alternative routes for Washington to Ottawa

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

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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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