Find flights
When to book
Airlines
FAQs

Cheap flights from Ottawa to Seattle from C$ 223

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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in March or October, booked 24 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap 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 25 March 2025.

Round-trip from

C$ 390

One-way from

C$ 223

Popular in

December

Cheapest in

March

Average price

C$ 553
WestJet
  • WestJet
  • 28/5-11/6
  • 2 total stops
  • 15h 59m total
  • Ottawa to Seattle
Search Deals
WestJet
  • WestJet
  • 1/6
  • 1 total stop
  • 9h 16m total
  • Ottawa to Seattle
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Ottawa to Seattle

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 25 March 2025.

Tue 15/76:00 a.m.YOW - SEA
1 stop9h 58mWestJet
Tue 22/72:05 p.m.SEA - YOW
1 stop7h 36mWestJet
Deal found 23/3C$ 380
Wed 7/511:20 a.m.YOW - SEA
2 stops15h 50mMultiple Airlines
Wed 14/56:00 a.m.SEA - YOW
1 stop10h 55mMultiple Airlines
Deal found 24/3C$ 468
Fri 25/73:35 p.m.YOW - SEA
1 stop7h 53mDelta
Wed 30/79:25 a.m.SEA - YOW
2 stops12h 16mDelta
Deal found 23/3C$ 658
Fri 25/710:25 a.m.YOW - SEA
1 stop13h 23mUnited Airlines
Fri 25/712:20 a.m.SEA - YOW
1 stop18h 15mUnited Airlines
Deal found 23/3C$ 722
Fri 28/32:10 p.m.YOW - SEA
1 stop10h 35mAir Canada
Fri 4/45:45 a.m.SEA - YOW
1 stop7h 19mAir Canada
Deal found 23/3C$ 1,016

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 25 March 2025.
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

Tue 15/7

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Tue 22/7

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 380

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 7/5

11:20 a.m.-12:10 a.m.

2 stops15h 50m

Seattle/Tacoma Intl

Wed 14/5

6:00 a.m.-7:55 p.m.

1 stop10h 55m

C$ 468

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 25/7

3:35 p.m.-8:28 p.m.

1 stop7h 53m

Seattle/Tacoma Intl

Tue 29/7

9:25 a.m.-12:41 a.m.

2 stops12h 16m

C$ 658

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 25/7

10:25 a.m.-8:48 p.m.

1 stop13h 23m

Seattle/Tacoma Intl

Fri 25/7

12:20 a.m.-9:35 p.m.

1 stop18h 15m

C$ 722

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 1/6

6:15 a.m.-12:31 p.m.

1 stop9h 16m

C$ 223

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 28/4

12:20 p.m.-11:35 a.m.

2 stops26h 15m

C$ 234

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 20/4

5:15 a.m.-2:23 p.m.

2 stops12h 08m

C$ 434

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 17/4

6:33 a.m.-7:01 p.m.

1 stop15h 28m

C$ 446

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/3

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 21 March 2025.

Booking 24 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$ 261). Flying from Ottawa to Seattle in December is currently the most expensive (average of C$ 353). 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.

What is the cheapest time of day to fly from YOW to SEA?

Find hourly flight availability from Ottawa to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 March 2025.

It’s typically best to fly out from Ottawa to Seattle in the evening. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Ottawa to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to Seattle. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Ottawa to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 25 March 2025.
United Airlines
7.4
Good
8,605 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
United Airlines
7.4
Good
8,605 reviews
United Airlines
7.4
Good
8,605 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
WestJet
7.2
Good
2,785 reviews
United Airlines
7.4
Good
8,605 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
Air Canada
7.0
Good
8,952 reviews
United Airlines
7.4
Good
8,605 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!

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.

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

    According to our current data, WestJet (C$ 390), and United Airlines (C$ 573) offers the cheapest pricing from Ottawa to Seattle. You may be able to fly from Ottawa to Seattle for 38% less than the average price by searching for these airlines.

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

    C$ 223 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from C$ 434 and C$ 446, 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$ 261). Flying from Ottawa to Seattle in December is currently the most expensive (average of C$ 353). 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
SeaTac
Tukwila
Marysville
Bothell
Leavenworth
Tacoma
Olympia
Lynnwood

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ottawa to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Seattle flights
Pierre Elliott Trudeau Intl to Seattle flights
Region of Waterloo Intl to Seattle flights
Hamilton to Seattle flights
Pearson Intl to Portland flights
Toronto Island to Seattle flights
Pierre Elliott Trudeau Intl to Portland flights
Region of Waterloo Intl to Portland flights
Hamilton to Portland flights
London to Seattle flights
Pearson Intl to Spokane flights
Ottawa to Portland flights
Toronto Island to Portland flights
Pearson Intl to Pasco flights
Pierre Elliott Trudeau Intl to Pasco flights
Pierre Elliott Trudeau Intl to Spokane flights
Pearson Intl to Wenatchee flights
Sault Ste Marie to Seattle flights
Kingston to Seattle flights
Windsor to Seattle flights
London to Portland flights
Thunder Bay to Portland 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 359AverageC$ 619FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 387AverageC$ 643FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 492AverageC$ 611FlexibilityNo cancel feeOn-time69%
Search United Airlines 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!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.