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Cheap flights from Washington to Ottawa from C$ 220

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
17 Apr — 24 Apr1
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 18 March 2026.

Tue 26/57:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Thu 28/56:55 a.m.
YOW
-
SEA
2 stops14h 50m
WestJet
Deal found 15/3C$ 489
Sat 16/511:37 a.m.
SEA
-
YOW
2 stops14h 58m
Multiple Airlines
Tue 2/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
Multiple Airlines
Deal found 16/3C$ 512
Thu 18/67:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Mon 22/66:55 a.m.
YOW
-
SEA
2 stops14h 50m
WestJet
Deal found 13/3C$ 516
Tue 16/67:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Tue 23/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 13/3C$ 518
Fri 12/610:30 a.m.
SEA
-
YOW
2 stops10h 50m
WestJet
Mon 15/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 15/3C$ 527
Wed 22/43:10 p.m.
SEA
-
YOW
2 stops30h 29m
WestJet
Wed 29/41:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 15/3C$ 530
Sat 16/57:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Tue 2/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 16/3C$ 531
Tue 16/67:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Sat 20/66:55 a.m.
YOW
-
SEA
2 stops14h 50m
WestJet
Deal found 15/3C$ 535
Mon 15/67:35 p.m.
SEA
-
YOW
2 stops13h 55m
WestJet
Tue 23/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 13/3C$ 540
Mon 27/42:30 p.m.
PDX
-
YOW
1 stop23h 45m
WestJet
Mon 4/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 13/3C$ 612
Mon 27/49:41 p.m.
PDX
-
YOW
2 stops28h 54m
Multiple Airlines
Mon 4/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
Multiple Airlines
Deal found 13/3C$ 626
Wed 29/42:30 p.m.
PDX
-
YOW
1 stop12h 05m
WestJet
Wed 6/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 15/3C$ 634

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 18 March 2026.

Round-trip from

C$ 489

One-way from

C$ 220

Popular in

December

Cheapest in

October

Average price

C$ 676
WestJet
  • WestJet
  • 26/5-28/5
  • 3 total stops
  • 21h 50m total
  • Washington to Ottawa
Search Deals
4/5
  • 4/5
  • 2 total stops
  • 29h 16m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 18 March 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

Wed 17/6

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

1 stop7h 00m

Ottawa

Sun 21/6

7:20 a.m.-6:45 p.m.

1 stop14h 25m

C$ 550

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Fri 1/5

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

2 stops19h 00m

Ottawa

Fri 8/5

7:20 a.m.-1:50 p.m.

1 stop9h 30m

C$ 645

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 16/4

8:25 a.m.-12:41 a.m.

2 stops13h 16m

Ottawa

Sun 19/4

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

2 stops11h 39m

C$ 648
Quickest round-trip

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 6/4

5:40 a.m.-3:53 p.m.

1 stop7h 13m

Ottawa

Wed 8/4

6:00 p.m.-10:53 p.m.

1 stop7h 53m

C$ 652

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Thu 21/5

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

2 stops19h 00m

Ottawa

Sat 30/5

7:20 a.m.-1:50 p.m.

1 stop9h 30m

C$ 661

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 15/4

10:20 a.m.-1:36 a.m.

2 stops12h 16m

Ottawa

Sun 19/4

6:00 p.m.-10:53 p.m.

1 stop7h 53m

C$ 671

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Mon 27/4

7:05 p.m.-10:11 a.m.

2 stops12h 06m

Ottawa

Mon 4/5

6:20 p.m.-9:30 a.m.

2 stops18h 10m

C$ 676

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 21/5

8:05 a.m.-12:30 p.m.

1 stop25h 25m

Ottawa

Thu 28/5

6:55 a.m.-6:45 p.m.

2 stops14h 50m

C$ 682

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 21/5

7:20 p.m.-6:00 a.m.

1 stop7h 40m

Ottawa

Mon 25/5

6:05 p.m.-10:40 p.m.

1 stop7h 35m

C$ 708

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Tue 28/4

3:15 p.m.-5:35 p.m.

3 stops23h 20m

Ottawa

Tue 5/5

6:55 a.m.-7:05 p.m.

3 stops15h 10m

C$ 711

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 32 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

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$ 270). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 756). 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 and Air Canada can get you from State of Washington to Ottawa in just under 7h. Your travel time can differ by up to 13m. 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.

  • 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$ 270). Flying from State of Washington to Ottawa in December is currently the most expensive (average of C$ 756). 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
Perth
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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