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Cheap flights from Ottawa to Seattle from C$ 213

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
20 Apr — 27 Apr1
1 adult

Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in March or August, 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 15 April 2025.

Round-trip from

C$ 350

One-way from

C$ 213

Popular in

December

Cheapest in

March

Average price

C$ 624
WestJet
  • WestJet
  • 11/8-20/8
  • 2 total stops
  • 17h 12m total
  • Ottawa to Seattle
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WestJet
  • WestJet
  • 11/5
  • 1 total stop
  • 9h 58m total
  • Ottawa to Seattle
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 60 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).
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Average for round-trip flights in April 2025
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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 15 April 2025.

Mon 11/86:10 a.m.YOW - SEA
1 stop9h 21mWestJet
Wed 20/81:50 p.m.SEA - YOW
1 stop7h 51mWestJet
Deal found 14/4C$ 350
Tue 6/56:00 p.m.YOW - SEA
1 stop7h 13mAir Canada
Mon 12/511:30 a.m.SEA - YOW
1 stop9h 49mAir Canada
Deal found 14/4C$ 391
Tue 6/57:29 p.m.YOW - SEA
2 stops17h 18mUnited Airlines
Mon 12/57:15 p.m.SEA - YOW
2 stops11h 43mUnited Airlines
Deal found 14/4C$ 416
Sat 3/510:25 a.m.YOW - SEA
1 stop12h 53mMultiple Airlines
Sat 17/55:30 a.m.SEA - YOW
2 stops10h 56mMultiple Airlines
Deal found 15/4C$ 460

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 15 April 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

Mon 11/8

6:10 a.m.-12:31 p.m.

1 stop9h 21m

Seattle/Tacoma Intl

Wed 20/8

1:50 p.m.-12:41 a.m.

1 stop7h 51m

C$ 350

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 6/5

6:00 p.m.-10:13 p.m.

1 stop7h 13m

Seattle/Tacoma Intl

Mon 12/5

11:30 a.m.-12:19 a.m.

1 stop9h 49m

C$ 391

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 6/5

7:29 p.m.-9:47 a.m.

2 stops17h 18m

Seattle/Tacoma Intl

Mon 12/5

7:15 p.m.-9:58 a.m.

2 stops11h 43m

C$ 416

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 3/5

10:25 a.m.-8:18 p.m.

1 stop12h 53m

Seattle/Tacoma Intl

Sat 17/5

5:30 a.m.-7:26 p.m.

2 stops10h 56m

C$ 460

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 11/5

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

1 stop9h 58m

C$ 213

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 14/8

6:00 p.m.-10:16 p.m.

1 stop7h 16m

C$ 234

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 20/5

12:20 p.m.-2:25 p.m.

3 stops29h 05m

C$ 267

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

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 11 April 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 15 April 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 15 April 2025.
United Airlines
7.4
Good
8,658 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,658 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
WestJet
7.2
Good
2,805 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Air Canada
7.0
Good
9,127 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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$ 350), Air Canada (C$ 391), and United Airlines (C$ 416) offers the cheapest pricing from Ottawa to Seattle. You may be able to fly from Ottawa to Seattle for 42% less than the average price by searching for these airlines.

  • 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

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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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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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 348AverageC$ 578FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 376AverageC$ 611FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 478AverageC$ 594FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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.

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