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Cheap flights from Washington to Ottawa from C$ 219

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
3 Jun — 10 Jun1
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 4 May 2026.

Mon 13/72:30 p.m.
PDX
-
YOW
1 stop7h 10m
WestJet
Tue 21/77:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 29/4C$ 466
Fri 10/72:30 p.m.
PDX
-
YOW
1 stop12h 05m
WestJet
Tue 14/77:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 1/5C$ 473
Thu 6/82:30 p.m.
PDX
-
YOW
1 stop7h 10m
WestJet
Mon 10/88:15 p.m.
YOW
-
PDX
1 stop20h 35m
WestJet
Deal found 30/4C$ 476
Thu 6/82:30 p.m.
PDX
-
YOW
1 stop12h 05m
WestJet
Sun 9/87:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 3/5C$ 478
Sun 27/97:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Fri 2/101:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 30/4C$ 481
Wed 27/510:30 a.m.
SEA
-
YOW
2 stops10h 50m
WestJet
Wed 3/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Deal found 29/4C$ 482
Thu 23/77:00 a.m.
SEA
-
YOW
1 stop9h 20m
WestJet
Sun 26/76:55 a.m.
YOW
-
SEA
2 stops14h 50m
WestJet
Deal found 29/4C$ 492
Fri 17/77:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Mon 20/77:20 a.m.
YOW
-
SEA
1 stop14h 25m
WestJet
Deal found 30/4C$ 503
Mon 5/102:30 p.m.
PDX
-
YOW
2 stops19h 00m
WestJet
Wed 14/107:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 29/4C$ 511
Wed 29/72:30 p.m.
PDX
-
YOW
1 stop12h 05m
WestJet
Mon 3/86:00 a.m.
YOW
-
PDX
1 stop10h 50m
WestJet
Deal found 30/4C$ 520
Mon 17/82:30 p.m.
PDX
-
YOW
1 stop7h 10m
WestJet
Mon 24/87:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 2/5C$ 522
Sun 17/57:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Wed 20/54:15 p.m.
YOW
-
SEA
1 stop29h 30m
WestJet
Deal found 3/5C$ 522

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 4 May 2026.

Round-trip from

C$ 453

One-way from

C$ 219

Popular in

December

Cheapest in

October

Average price

C$ 595
WestJet
  • WestJet
  • 13/7-21/7
  • 2 total stops
  • 15h 25m total
  • Washington to Ottawa
Search Deals
WestJet
  • WestJet
  • 28/7
  • 1 total stop
  • 7h 10m total
  • Washington to Ottawa
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 125 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 May 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 4 May 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

Sat 25/7

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

1 stop7h 15m

Ottawa

Sat 1/8

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

2 stops18h 25m

C$ 527

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 16/8

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

2 stops26h 30m

Ottawa

Tue 25/8

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

2 stops14h 50m

C$ 535

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 2/6

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

1 stop7h 00m

Ottawa

Tue 9/6

6:15 p.m.-6:45 p.m.

2 stops27h 30m

C$ 538

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 17/7

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

1 stop7h 00m

Ottawa

Mon 20/7

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

2 stops18h 25m

C$ 545

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 10/6

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

1 stop7h 00m

Ottawa

Sun 28/6

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

2 stops18h 25m

C$ 549

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 23/10

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

1 stop7h 00m

Ottawa

Fri 30/10

6:00 a.m.-2:20 p.m.

1 stop11h 20m

C$ 550

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Wed 29/7

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

1 stop7h 10m

Ottawa

Mon 3/8

6:25 p.m.-1:50 p.m.

2 stops46h 25m

C$ 560

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 5/6

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

1 stop16h 05m

Ottawa

Sun 7/6

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

1 stop29h 20m

C$ 580

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 3/6

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

1 stop7h 00m

Ottawa

Sat 6/6

6:15 p.m.-6:45 p.m.

2 stops27h 30m

C$ 631

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Tue 22/9

8:29 a.m.-9:35 p.m.

1 stop10h 06m

Ottawa

Fri 25/9

6:00 p.m.-9:54 a.m.

1 stop18h 54m

C$ 658

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 31 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 far ahead should I book a flight from State of Washington to Ottawa?

The price you pay for your flight from State of Washington to Ottawa may vary depending on when you book. For the best chance of a lower fare, look to book 89 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 and United Airlines can get you from State of Washington to Ottawa in just under 10h 06m. Your travel time can differ by up to 1h 59m. 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
Brockville
Wakefield
Pembroke
Smiths Falls

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Alternative routes for Washington to Ottawa

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Fly with Cheapflights

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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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