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$181+ Cheap flights from Region of Waterloo Intl (YKF) to Seattle (SEA)

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
YKF — SEA
abr. 20 — abr. 271
dom. 4/20
dom. 4/27
1 adult, Economy
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Cheap flight deals from Region of Waterloo Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Region of Waterloo Intl (YKF) 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 abril 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$244
(Mytrip)

One-way from

$181
(EaseMyTrip)

Popular in

November

Cheapest in

May

Average price

$320
Provider with most accurate pricing for Toronto Region of Waterloo Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto Region of Waterloo Intl-Seattle/Tacoma Intl flights.
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From Toronto Region of Waterloo Intl to Seattle/Tacoma Intl
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One-way flight from Toronto Region of Waterloo Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 38% potential increase in price ($216 potential increase over avg. RT price).
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Cheapest flight prices on average. 16% potential price decrease ($52 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 Region of Waterloo Intl to Seattle

Cheapest flights from Region of Waterloo Intl to Seattle
Explore the most affordable flight options available from Region of Waterloo Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 15, 2025.

This Mytrip deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/86:00 amYKF - SEA
3 stops35h 25mMultiple Airlines
lun. 5/123:20 pmSEA - YKF
2 stops30h 26mMultiple Airlines
Deal found 4/15$244
This FlightHub deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/176:00 amYKF - SEA
1 stop9h 59mWestJet
mar. 9/232:05 pmSEA - YKF
1 stop7h 40mWestJet
Deal found 4/15$246

Cheapflights Fare Finder

Customize your flight search to find flights from Region of Waterloo Intl 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 2,558,603 searches. Data last updated abril 15, 2025.
Use the filters below to find and compare flights from Toronto Region of Waterloo Intl Airport to Seattle that are best for you.

Fly from

Region of Waterloo Intl

Fly to

Seattle

Route

Depart

Return

Price

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

jue. 5/8

6:00 am-2:25 pm

3 stops35h 25m

Seattle/Tacoma Intl

lun. 5/12

3:20 pm-12:46 am

2 stops30h 26m

$244

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

mié. 9/17

6:00 am-12:59 pm

1 stop9h 59m

Seattle/Tacoma Intl

mar. 9/23

2:05 pm-12:45 am

1 stop7h 40m

$246

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

lun. 5/26

5:35 am-10:45 am

1 stop8h 10m

$181

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

dom. 5/11

6:00 am-2:09 pm

2 stops11h 09m

$184

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

jue. 5/8

8:25 pm-7:37 am

1 stop14h 12m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Compare providers for flights from Region of Waterloo Intl to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Region of Waterloo Intl to Seattle in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Toronto Region of Waterloo Intl Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Toronto Region of Waterloo Intl Airport-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Toronto Region of Waterloo Intl Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Toronto Region of Waterloo Intl Airport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Toronto Region of Waterloo Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Region of Waterloo Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Region of Waterloo Intl 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 Toronto Region of Waterloo Intl Airport to Seattle

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

Find hourly flight availability from Region of Waterloo Intl 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 abril 15, 2025.

One of the essential ways to save on airfare from Toronto Region of Waterloo Intl Airport to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 59% on airfare.

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 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 abril 15, 2025.
WestJet
7.2
Good
2,805 reviews

Boarding

7.4

Entertainment

6.1

Comfort

7.0

Overall

7.2

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
WestJet
7.2
Good
2,805 reviews
WestJet
7.2
Good
2,805 reviews

Boarding

7.4

Entertainment

6.1

Comfort

7.0

Overall

7.2

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
Air Canada
7.0
Good
9,127 reviews
WestJet
7.2
Good
2,805 reviews

Boarding

7.4

Entertainment

6.1

Comfort

7.0

Overall

7.2

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Related info for your journey

Find useful and relevant information for your journey from Region of Waterloo Intl to Seattle. 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 Seattle from Toronto Region of Waterloo Intl?

    For a flight from Toronto Region of Waterloo Intl to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 0 inbound flights from Toronto Region of Waterloo Intl per day. 2 airlines have flights to Seattle/Tacoma Intl from Toronto Region of Waterloo Intl on a regular basis.

  • What is the cheapest airline to fly from Toronto Region of Waterloo Intl Airport to Seattle round-trip?

    According to our current data, WestJet ($246), offers the cheapest pricing from Toronto Region of Waterloo Intl Airport to Seattle. WestJet is 30% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Region of Waterloo Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Region of Waterloo Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Region of Waterloo Intl to Seattle?

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

  • Can I find deals for business class flights from Region of Waterloo Intl to Seattle?

    Yes. Cheapflights offers flight deals from Region of Waterloo Intl 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 Toronto Region of Waterloo Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Toronto Region of Waterloo Intl Airport to Seattle (average of $238). Flying from Toronto Region of Waterloo Intl Airport to Seattle in July is currently the most expensive (average of $411). 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

Traveling to a place near Toronto Region of Waterloo Intl Airport?

Book flights to Toronto Region of Waterloo Intl Airport if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Aberdeen
Kent
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

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Alternative routes for Region of Waterloo Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Seattle flights
Pearson Intl to Portland flights
Hamilton to Portland flights
Pearson Intl to Spokane flights
Toronto Island to Portland flights

Top 2 airlines flying from Region of Waterloo Intl to Seattle

Discover the top 2 airlines that operate flights from Region of Waterloo Intl 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 2,558,603 searches. Data last updated abril 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$122Average$452FlexibilityNo cancel feeOn-time67%
WestJetCheapest$141Average$288FlexibilityNo cancel feeOn-time60%

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