HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Kitchener-Waterloo (YKF) to Seattle (SEA) from $154

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 10/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
YKF — SEA
May 29 — Jun 51
From?
To?
Wed 5/29
Wed 6/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Cheap flight deals from Kitchener-Waterloo to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Kitchener-Waterloo (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 May 24, 2024.

Round-trip from

$247

One-way from

$188
From Toronto Kitchener-Waterloo to Seattle/Tacoma Intl
Search Deals
One-way flight from Toronto Kitchener-Waterloo to Seattle/Tacoma Intl
Search Deals

How far in advance should I book a flight from Toronto Kitchener-Waterloo Airport to Seattle?

Travelers have found it’s best to book a flight 51 days in advance to save up to 75% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 51 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Toronto Kitchener-Waterloo Airport to Seattle 1-2 weeks in advance for as low as $571, or $674 for flights within the next 24 hours.

What is the cheapest month to fly from Toronto Kitchener-Waterloo Airport to Seattle?

October can be a great time to fly to Seattle from Toronto Kitchener-Waterloo Airport with a flight ticket averaging about $523. Cheapflights users have found deals in the month of October for as cheap as $333. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from Toronto Kitchener-Waterloo Airport to Seattle (YKF - SEA)?

When flying from Toronto Kitchener-Waterloo Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap WestJet flights from Kitchener-Waterloo to Seattle

Explore cheap flight options specifically provided by WestJet for the route between Kitchener-Waterloo and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,725,499 searches. Data last updated May 24, 2024.
Tue 8/206:15 amYKF - SEA
1 stop9h 41mWestJet
Thu 8/291:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$262
Mon 7/156:15 amYKF - SEA
1 stop9h 41mWestJet
Thu 7/181:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$266
Fri 9/66:15 amYKF - SEA
1 stop9h 41mWestJet
Wed 9/111:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$279
Fri 8/236:15 amYKF - SEA
1 stop9h 41mWestJet
Mon 8/267:00 amSEA - YKF
1 stop7h 23mWestJet
Deal found 5/23$288
Mon 7/296:20 pmYKF - SEA
1 stop21h 36mWestJet
Sun 8/41:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$289
Mon 8/126:15 amYKF - SEA
1 stop9h 41mWestJet
Sat 9/77:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/23$296
Wed 9/186:15 amYKF - SEA
1 stop9h 41mWestJet
Mon 9/233:40 pmSEA - YKF
2 stops22h 48mWestJet
Deal found 5/23$311
Tue 6/256:15 amYKF - SEA
1 stop9h 41mWestJet
Fri 7/121:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/22$325
Mon 7/296:20 pmYKF - SEA
1 stop21h 36mWestJet
Sun 8/46:15 pmSEA - YKF
1 stop27h 37mWestJet
Deal found 5/23$333

Cheap Kitchener-Waterloo to Seattle flights in May & June 2024

Find cheap flight options from Kitchener-Waterloo to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,725,499 searches. Prices were last updated on May 24, 2024.
Tue 6/256:15 amYKF - SEA
1 stop9h 41mWestJet
Fri 7/121:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/22$325
Mon 6/246:15 amYKF - SEA
1 stop9h 41mWestJet
Fri 6/287:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/22$340
Mon 6/246:15 amYKF - SEA
1 stop9h 41mWestJet
Sat 7/67:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/23$361
Fri 6/216:15 amYKF - SEA
1 stop17h 06mWestJet
Fri 6/287:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/22$387
Tue 6/256:15 amYKF - SEA
1 stop9h 41mWestJet
Sun 7/287:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/23$388
Tue 6/256:15 amYKF - SEA
1 stop9h 41mWestJet
Sat 7/131:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$406
Wed 6/196:15 amYKF - SEA
1 stop9h 41mWestJet
Wed 6/261:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/22$433
Wed 6/196:15 amYKF - SEA
1 stop9h 41mWestJet
Tue 7/97:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/23$447
Tue 6/256:15 amYKF - SEA
1 stop9h 41mWestJet
Fri 7/123:30 pmSEA - YKF
2 stops30h 22mWestJet
Deal found 5/22$451

Kitchener-Waterloo to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Kitchener-Waterloo and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,725,499 searches. Data last updated May 24, 2024.
Tue 8/206:15 amYKF - SEA
1 stop9h 41mWestJet
Thu 8/291:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$262
Mon 7/156:15 amYKF - SEA
1 stop9h 41mWestJet
Thu 7/181:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$266
Fri 9/66:15 amYKF - SEA
1 stop9h 41mWestJet
Wed 9/111:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$279
Fri 8/236:15 amYKF - SEA
1 stop9h 41mWestJet
Mon 8/267:00 amSEA - YKF
1 stop7h 23mWestJet
Deal found 5/23$288
Mon 7/296:20 pmYKF - SEA
1 stop21h 36mWestJet
Sun 8/41:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/23$289
Mon 8/126:15 amYKF - SEA
1 stop9h 41mWestJet
Sat 9/77:00 amSEA - YKF
1 stop14h 52mWestJet
Deal found 5/23$296
Wed 9/186:15 amYKF - SEA
1 stop9h 41mWestJet
Mon 9/233:40 pmSEA - YKF
2 stops22h 48mWestJet
Deal found 5/23$311
Tue 6/256:15 amYKF - SEA
1 stop9h 41mWestJet
Fri 7/121:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/22$325
Mon 7/296:20 pmYKF - SEA
1 stop21h 36mWestJet
Sun 8/46:15 pmSEA - YKF
1 stop27h 37mWestJet
Deal found 5/23$333

Kitchener-Waterloo to Seattle flights leaving soon

Find last-minute flight options from Kitchener-Waterloo to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,725,499 searches. Data last updated May 24, 2024.
Wed 5/296:15 amYKF - SEA
1 stop9h 41mWestJet
Tue 6/47:00 amSEA - YKF
1 stop15h 10mWestJet
Deal found 5/23$487
Wed 5/296:15 amYKF - SEA
1 stop9h 41mWestJet
Sun 6/27:00 amSEA - YKF
1 stop15h 10mWestJet
Deal found 5/23$493
Thu 5/306:15 amYKF - SEA
1 stop17h 05mWestJet
Sun 6/27:00 amSEA - YKF
1 stop15h 10mWestJet
Deal found 5/23$532
Wed 5/296:15 amYKF - SEA
1 stop9h 41mWestJet
Mon 6/37:00 amSEA - YKF
1 stop15h 10mWestJet
Deal found 5/23$621
Fri 5/316:15 amYKF - SEA
1 stop17h 05mWestJet
Sun 6/97:00 amSEA - YKF
1 stop15h 10mWestJet
Deal found 5/23$627
Wed 5/296:15 amYKF - SEA
1 stop9h 41mWestJet
Wed 6/197:38 amSEA - YKF
2 stops14h 14mWestJet
Deal found 5/22$638
Sun 6/26:15 amYKF - SEA
1 stop9h 41mWestJet
Thu 6/131:50 pmSEA - YKF
1 stop8h 20mWestJet
Deal found 5/23$1,127

One-way flights to Seattle from Kitchener-Waterloo

Search for one-way flight options from Kitchener-Waterloo to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,725,499 searches. Data last updated May 24, 2024.
Wed 10/166:15 amYKF - SEA
1 stop9h 41mWestJet
Deal found 5/23$154
Wed 10/236:15 amYKF - SEA
1 stop9h 41mWestJet
Deal found 5/23$155
Mon 7/296:15 amYKF - SEA
1 stop14h 06mWestJet
Deal found 5/23$174
Thu 8/226:20 pmYKF - SEA
1 stop21h 36mWestJet
Deal found 5/23$175
Sun 9/226:20 pmYKF - SEA
1 stop29h 06mWestJet
Deal found 5/23$181
Mon 9/306:20 pmYKF - SEA
1 stop21h 36mWestJet
Deal found 5/23$186
Wed 10/236:05 amYKF - SEA
2 stops11h 25mAir Canada
Deal found 5/23$188
Wed 6/266:15 amYKF - SEA
1 stop17h 06mWestJet
Deal found 5/23$201
Mon 6/106:15 amYKF - SEA
1 stop9h 41mWestJet
Deal found 5/23$205

Find flights from Kitchener-Waterloo to Seattle within your budget

Customize your flight search to find flights from Kitchener-Waterloo 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 2,725,499 searches. Data last updated May 24, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$262 - $512

Route

Depart

Return

Price

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Tue 8/20

1 stop9h 41m

Seattle/Tacoma Intl

Thu 8/29

1 stop8h 02m

$262

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Mon 7/15

1 stop9h 41m

Seattle/Tacoma Intl

Thu 7/18

1 stop8h 02m

$266

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Fri 9/6

1 stop9h 41m

Seattle/Tacoma Intl

Wed 9/11

1 stop8h 02m

$279

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Fri 8/23

1 stop9h 41m

Seattle/Tacoma Intl

Mon 8/26

1 stop7h 23m

$288

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Mon 7/29

1 stop21h 36m

Seattle/Tacoma Intl

Sun 8/4

1 stop8h 02m

$289

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Mon 8/12

1 stop9h 41m

Seattle/Tacoma Intl

Sat 9/7

1 stop14h 52m

$296

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Wed 9/18

1 stop9h 41m

Seattle/Tacoma Intl

Mon 9/23

2 stops22h 48m

$311

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Tue 6/25

1 stop9h 41m

Seattle/Tacoma Intl

Fri 7/12

1 stop8h 02m

$325

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

Sat 6/22

3 stops29h 17m

Seattle/Tacoma Intl

Sat 6/29

3 stops31h 01m

$512

Flights are sorted by cheapest first

Deals found on 5/23

No data available for this route at this time. Please check back soon.

Best time to book a flight from Kitchener-Waterloo to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Kitchener-Waterloo 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.

Temperature and rainfall in Seattle by month

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

SEA

Temperature

41 - 66.2 °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 May 24, 2024.
WestJet
7.5
Good
2,895 reviews
Check prices

Entertainment

6.5

Comfort

7.3

Crew

8.2

Food

6.5

Overall

7.5

Boarding

7.7

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

WestJet
7.5
Good
2,895 reviews
WestJet
7.5
Good
2,895 reviews
Check prices

Entertainment

6.5

Comfort

7.3

Crew

8.2

Food

6.5

Overall

7.5

Boarding

7.7

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

Air Canada
7.0
Good
6,963 reviews
WestJet
7.5
Good
2,895 reviews
Check prices

Entertainment

6.5

Comfort

7.3

Crew

8.2

Food

6.5

Overall

7.5

Boarding

7.7

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

Related info for your journey

Find useful and relevant information for your journey from Kitchener-Waterloo 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 Kitchener-Waterloo?

    For a flight from Toronto Kitchener-Waterloo 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 Kitchener-Waterloo per day. 0 airlines have flights to Seattle/Tacoma Intl from Toronto Kitchener-Waterloo on a regular basis.

  • Can I find flights from Toronto Kitchener-Waterloo Airport to Seattle for under $300 on Cheapflights?

    Yes, there are multiple flights from Toronto Kitchener-Waterloo Airport to Seattle for under $300. The cheapest flight booked recently is on WestJet for just $262, but on average you can expect to pay $340.

  • Are there last-minute flights available from Toronto Kitchener-Waterloo Airport to Seattle for under $500?

    There are currently 7+ open flights from Toronto Kitchener-Waterloo Airport to Seattle within the next 7 days for less than $500.

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

    Cheapflights users have booked flights from Toronto Kitchener-Waterloo Airport to Seattle round-trip from $262.

  • What does YKF to SEA mean?

    YKF stands for Toronto Kitchener-Waterloo Airport, while SEA stands for Seattle/Tacoma Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Kitchener-Waterloo to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Kitchener-Waterloo to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Kitchener-Waterloo to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Kitchener-Waterloo to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Kitchener-Waterloo to Seattle that include hotel bookings?

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

  • How can I find direct flights from Kitchener-Waterloo to Seattle?

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

  • Can I find deals for business class flights from Kitchener-Waterloo to Seattle?

    Yes. Cheapflights offers flight deals from Kitchener-Waterloo 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.

  • Can I find deals for flights from Kitchener-Waterloo to Seattle that allow pets onboard?

    Many airlines flying from Kitchener-Waterloo to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Kitchener-Waterloo to Seattle?

    Yes, you can often find last-minute deals on Kitchener-Waterloo to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Toronto Kitchener-Waterloo Airport to Seattle flight deals updated?

    The Toronto Kitchener-Waterloo Airport to Seattle flight deals you see on this page were last updated on 5/23.

  • When is the best time to book a flight from Toronto Kitchener-Waterloo Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Toronto Kitchener-Waterloo Airport to Seattle (average of $247). Flying from Toronto Kitchener-Waterloo Airport to Seattle in July is currently the most expensive (average of $406). 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

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 Kitchener-Waterloo 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
Toronto Island to Portland flights
Pearson Intl to Spokane flights
Honolulu to Kaua'i flights
San Francisco to Toronto flights
St. Louis to Chicago flights
USA to Brazil flights
Minneapolis to Denver flights
New York to Moscow flights
Los Angeles to Seoul flights
Dallas to Mumbai flights
Orlando to Las Vegas flights
Phoenix to Seattle flights
El Paso to Las Vegas flights
Toronto Kitchener-Waterloo Airport to San Francisco flights

Search flights from Kitchener-Waterloo to Seattle by cabin class

Find flights from Kitchener-Waterloo to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Neiva La Marguita
Flights to Hyannis Barnstable
Flights to Laayoune Hassan I
Flights to Edremit/Korfez
Flights to Vava'u Lupepau'U
Flights to Surigao
Flights to Melilla
Flights to Virac
Flights to Rhinelander Oneida County
Flights to Cornwall Newquay
Flights to Parikia Paros
Flights to Cortez Montezuma County
Flights to Mason City
Flights to Ningbo Lishe Intl
Flights to Miyakojima Hirara
Flights to Kirkwall Arpt
Flights to Girona Costa Brava
Flights to Provincetown
Flights to Perugia Sant Egidio
Flights to Samos
Flights to Constanţa Mihail Kogalniceanu
Flights to Dharamshala Kangra
Flights to Dalaman
Flights to Pellston Emmet County

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 Kitchener-Waterloo to Seattle?

Deals for Kitchener-Waterloo to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Kitchener-Waterloo to Seattle?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Kitchener-Waterloo to Seattle for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Kitchener-Waterloo to Seattle with no change fees?

Yes, we can. To see specific flights from Kitchener-Waterloo to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Kitchener-Waterloo to Seattle become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Kitchener-Waterloo today and book when prices fit your budget.

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.
View all available airlines