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Cheap flights from Ottawa to Seattle from C$ 330

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 13/3. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Seattle
Explore the most affordable flight options available from Ottawa to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 January 2026.

Wed 4/35:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Sun 8/33:10 p.m.
SEA
-
YOW
2 stops24h 13m
WestJet
Deal found 27/1C$ 366
Wed 8/45:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Tue 14/43:10 p.m.
SEA
-
YOW
1 stop22h 43m
WestJet
Deal found 27/1C$ 371
Fri 15/51:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Sat 23/57:35 p.m.
SEA
-
YOW
1 stop16h 50m
WestJet
Deal found 27/1C$ 378
Mon 1/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Fri 12/610:30 a.m.
SEA
-
YOW
2 stops23h 00m
WestJet
Deal found 26/1C$ 418

Find flight deals from Ottawa to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 January 2026.

Round-trip from

C$ 366

One-way from

C$ 330

Popular in

December

Cheapest in

January

Average price

C$ 435
WestJet
  • WestJet
  • 4/3-8/3
  • 4 total stops
  • 35h 52m total
  • Ottawa to Seattle
Search Deals
Air Canada
  • Air Canada
  • 13/3
  • 1 total stop
  • 13h 16m total
  • Ottawa to Seattle
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 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 Ottawa to Seattle 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 27 January 2026.
Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.

Fly from

Ottawa

Fly to

Seattle

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/3

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

2 stops11h 39m

Seattle/Tacoma Intl

Sun 8/3

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

2 stops24h 13m

C$ 366

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/4

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

2 stops11h 39m

Seattle/Tacoma Intl

Tue 14/4

3:10 p.m.-12:39 a.m.

2 stops30h 29m

C$ 379

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 15/5

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

1 stop8h 25m

Seattle/Tacoma Intl

Sat 23/5

10:30 a.m.-12:30 p.m.

2 stops23h 00m

C$ 381

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 1/6

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

1 stop8h 25m

Seattle/Tacoma Intl

Fri 12/6

10:30 a.m.-12:30 p.m.

2 stops23h 00m

C$ 418

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 24/2

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

2 stops11h 39m

Seattle/Tacoma Intl

Tue 3/3

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

1 stop7h 43m

C$ 429

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 24/2

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

1 stop8h 07m

Seattle/Tacoma Intl

Tue 3/3

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

1 stop7h 43m

C$ 437

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 10/2

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

1 stop8h 07m

Seattle/Tacoma Intl

Tue 24/2

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

1 stop7h 43m

C$ 455

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 13/3

12:00 p.m.-10:16 p.m.

1 stop13h 16m

C$ 330

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 13/3

11:00 a.m.-10:55 a.m.

2 stops26h 55m

C$ 383

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/2

4:15 p.m.-9:36 a.m.

3 stops44h 21m

C$ 438

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 11 results
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Best time to book a flight from Ottawa to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ottawa 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 Ottawa to Seattle

How far ahead should I book a flight from Ottawa to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Seattle. Price data was last updated on 23 January 2026.

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ottawa to Seattle?

Currently, January is the cheapest month in which you can book a flight from Ottawa to Seattle (average of C$ 208). Flying from Ottawa to Seattle in December is currently the most expensive (average of C$ 466). 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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 27 January 2026.
Get a feel of what it's like to fly with United Airlines,WestJet, andAir Canada from Ottawa to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,205 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,205 reviews
United Airlines
7.4
Good
9,205 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,251 reviews
United Airlines
7.4
Good
9,205 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,660 reviews
United Airlines
7.4
Good
9,205 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ottawa to Seattle?

    There are many flights that can get you from Ottawa to Seattle in 11h 39m. Fly via WestJet to get the fastest option. The distance between Ottawa and Seattle is about 3529 km.

  • What are the cheapest airlines flying from Ottawa to Seattle round-trip?

    According to our current data, United Airlines (C$ 263), Air Canada (C$ 338), and WestJet (C$ 346) offers the cheapest pricing from Ottawa to Seattle. You may be able to fly from Ottawa to Seattle for 53% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Ottawa to Seattle one-way?

    C$ 200 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from C$ 206 and C$ 275, respectively.

  • Can I find deals for flights from Ottawa to Seattle that include hotel bookings?

    Yes. In addition to deals on Ottawa to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Seattle.

  • Can I find deals for business class flights from Ottawa to Seattle?

    Yes. Cheapflights offers flight deals from Ottawa to Seattle 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 Ottawa to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Ottawa to Seattle (average of C$ 208). Flying from Ottawa to Seattle in December is currently the most expensive (average of C$ 466). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
SeaTac
Mukilteo
Tacoma
Kent
Tukwila
Bothell
Cashmere
Olympia
Renton
Lynnwood
Marysville
Kirkland

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ottawa to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Hamilton to Seattle flights
Pierre Elliott Trudeau Intl to Seattle flights
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London to Seattle flights
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Region of Waterloo Intl to Portland flights
Pearson Intl to Spokane flights
Pearson Intl to Pasco flights
Thunder Bay to Portland flights
London to Portland flights
Windsor to Seattle flights
Pearson Intl to Wenatchee flights
Sault Ste Marie to Seattle flights
Pierre Elliott Trudeau Intl to Pasco flights
Kingston to Seattle flights

Top 3 airlines flying from Ottawa to Seattle

Discover the top 3 airlines that operate flights from Ottawa to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 263AverageC$ 526FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 338AverageC$ 588FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 346AverageC$ 512FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to Seattle?

Cheapflights makes it easy to find Ottawa to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Seattle?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from Ottawa.

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

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

Can Cheapflights notify me if prices for flights from Ottawa to Seattle become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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