Find Cheap Flights from Seattle/Tacoma Intl to Toronto (SEA - YTO)

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Good to Know

Low Season:
August
Best time to beat the crowds
3%
expected price decrease
High Season:
January
Most popular time to fly
18%
expected price increase
Average Price:
$538
(avg. price over the last 2 weeks)
Good Deal:
$311
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Toronto

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $310 or less.
The cheapest flight from Seattle/Tacoma Intl to Toronto was found 47 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
Morning departure is around 32% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Seattle/Tacoma Intl to Toronto Flights

How long does a flight from Seattle/Tacoma Intl to Toronto take?
An average nonstop flight takes 4h 43m, covering a distance of 2066 miles.
How many flights are there between Seattle/Tacoma Intl and Toronto?
There are 67 (nonstop) flights between Seattle/Tacoma Intl and Toronto per week, averaging 8 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Toronto?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($276), Delta ($427) and Air Canada ($475).
Do I need a passport to fly between Seattle/Tacoma Intl and Toronto?
Yes.
Which airlines fly most frequently between Seattle/Tacoma Intl and Toronto?
Turkish Airlines (3 times daily), United (3 times daily), Air Canada (2 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Seattle/Tacoma Intl to Toronto?
For Seattle/Tacoma Intl to Toronto, Friday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Toronto back to Seattle/Tacoma Intl, the best deals are generally found on Wednesday, with Friday being the most expensive.

Book cheap flights from Seattle/Tacoma Intl to Toronto (round-trip)

Airports
Origin
Seattle
$276
only
$276
Destination
Toronto
$276
only
$276
$416
only
$416
Fri, Mar 2
SEA
YYZ
22h 43m
Tue, Mar 20
YYZ
SEA
12h 00m
Trip: 18 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 4
SEA
YYZ
6h 58m
Sun, Apr 8
YYZ
SEA
9h 20m
Trip: 5 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 15315 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
ATL
MEX
Excellent 8.3

Tudo conforme esperado em um voo da Delta.

Nada a reclamar.

ATL
BWI
Okay 4.6

Snacks & beverages on a 1 hour flight. Very nice crew

Older plane, no entertainment

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

TLH
ATL
Mediocre 2.0

Ice in the morning in Atlanta and Delta cancels my 6pm flight to Atlanta leaving me no flight home that night.

MEX
ATL
Good 7.0

Beautiful plane, great entertainment system, two bathrooms for economy class, decent food

Fri, Mar 30
SEA
YYZ
4h 43m
Sun, Apr 8
YYZ
SEA
5h 14m
Trip: 10 days
6.7GoodShow reviews
Overall 6.7 Good
Based on 54 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.4
SEA
YYZ
Mediocre 2.6

Nothing. NOTHING.

It took two hours to check my bag at the airport. The plane engine needed to be jump started, and I missed my connection flight to Paris. I had to spend an entire day stuck in Toronto, sick from terrible Hotel and airport food, cheap vouchers for terrible food, I missed my traveling companion who made the flight to Paris. I left my hat on the plane after the terrible flight in which they refused us any basic courtesies for the numerous passengers who were about to be stranded, and then the grooming crew kept my hat instead of turning it in to lost and found. Best part? Customer service told me that since I booked via Kayak, that I was not a valued customer and that they would not extend any courtesies to me for destroying my work trip itinerary.

SEA
YYZ
Okay 4.8

movie selection on international flight was great.

Had a serious delay, which was not acknowledged in anyway. We just waited near the gate for a long, long time. Also, for one of my flights, my group number was never called. I asked the flight attendant about it (when I passed through the gate after most other customers had boarded) and she flippantly responded with something like, "Yeah, maybe I didn't call your boarding zone. I don't know. Whatever." This left a terrible first impression on me.

SEA
YYZ
Excellent 10.0

Numerous people had oversize carry on luggage that should have been checked. The passengers like me had smaller than regulation carry on but there did not seem to be room in the overhead compartments.

SEA
YYZ
Mediocre 2.0

None

Better luggage Service

SEA
YYZ
Mediocre 2.3

Not much

I was too tall for the seats and the person in front of me was unable to put there seat back, they wanted me to trade with someone else but the. I just would have been a problem for someone else. The steward made me feel as though I was at fault because I should have payed the extra 100 to have emergency exit seating, they tried to get me to sit in the very back row of the plain and sit sideways across the two seats which means I would not be able to sit next to my fiancé. The whole thing was embarrassing and very rude, maybe people of 6'6" should be charged for emergency exit!!

Thu, Feb 8
SEA
YYZ
9h 14m
Tue, Feb 27
YYZ
SEA
26h 49m
Trip: 20 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Feb 12
SEA
YYZ
7h 48m
Wed, Feb 21
YYZ
SEA
11h 45m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Tue, May 22
SEA
YYZ
15h 07m
Fri, May 25
YYZ
SEA
9h 04m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Mar 31
SEA
YYZ
7h 28m
Sun, Apr 8
YYZ
SEA
5h 14m
Trip: 9 days
6.7GoodShow reviews
Overall 6.7 Good
Based on 54 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.4
SEA
YYZ
Mediocre 2.6

Nothing. NOTHING.

It took two hours to check my bag at the airport. The plane engine needed to be jump started, and I missed my connection flight to Paris. I had to spend an entire day stuck in Toronto, sick from terrible Hotel and airport food, cheap vouchers for terrible food, I missed my traveling companion who made the flight to Paris. I left my hat on the plane after the terrible flight in which they refused us any basic courtesies for the numerous passengers who were about to be stranded, and then the grooming crew kept my hat instead of turning it in to lost and found. Best part? Customer service told me that since I booked via Kayak, that I was not a valued customer and that they would not extend any courtesies to me for destroying my work trip itinerary.

SEA
YYZ
Excellent 10.0

Friendly service is so important to me - and the staff and flight crew at Air Canada met all my expectations. I had the displeasure of flying United on the way to Seattle and I must say the service at Air Canada is far above!

SEA
YYZ
Excellent 8.3

Wifi was great with very little disruptions. Service on the flight was expedient and frequent. In seat entertainment was excellent

I had the only seat on the row with no power for devices. All seats have USB power, but I was working on a laptop and had no AC power. The other seats did. This seems to be the case for the window seats on the right side of the plane and the aisle seats on the left side of the plane.

SEA
YYZ
Excellent 10.0

Numerous people had oversize carry on luggage that should have been checked. The passengers like me had smaller than regulation carry on but there did not seem to be room in the overhead compartments.

SEA
YYZ
Good 6.8

I was not charged overweight for going over by 2 pounds since I had a Business Class ticket connection to my final destination.

For an almost 4 hours, 400 USD international flight I would have expected to have at least a snack to eat a one luggage to check in on the price. I am an international traveler which doesn't have a choice but to carry a suitcase. Not to say that once on board I was requested to check in my carry on because there was no room on the plane and that I had to travel with my personal item on my feets since there was no available room at the over the head compartiment since I was identified with Zone 5 boarding.

Tue, Apr 17
SEA
YYZ
7h 29m
Fri, Apr 27
YYZ
SEA
7h 21m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Apr 1
SEA
YYZ
8h 28m
Sat, Apr 7
YYZ
SEA
9h 04m
Trip: 7 days
6.7GoodShow reviews
Overall 6.7 Good
Based on 54 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.4
SEA
YYZ
Okay 4.8

movie selection on international flight was great.

Had a serious delay, which was not acknowledged in anyway. We just waited near the gate for a long, long time. Also, for one of my flights, my group number was never called. I asked the flight attendant about it (when I passed through the gate after most other customers had boarded) and she flippantly responded with something like, "Yeah, maybe I didn't call your boarding zone. I don't know. Whatever." This left a terrible first impression on me.

SEA
YYZ
Okay 4.3

The seats were fairly comfortable for such a small plane.

There was no meal on an international flight of more than four hours.

SEA
YYZ
Mediocre 2.6

Nothing. NOTHING.

It took two hours to check my bag at the airport. The plane engine needed to be jump started, and I missed my connection flight to Paris. I had to spend an entire day stuck in Toronto, sick from terrible Hotel and airport food, cheap vouchers for terrible food, I missed my traveling companion who made the flight to Paris. I left my hat on the plane after the terrible flight in which they refused us any basic courtesies for the numerous passengers who were about to be stranded, and then the grooming crew kept my hat instead of turning it in to lost and found. Best part? Customer service told me that since I booked via Kayak, that I was not a valued customer and that they would not extend any courtesies to me for destroying my work trip itinerary.

SEA
YYZ
Excellent 10.0

Numerous people had oversize carry on luggage that should have been checked. The passengers like me had smaller than regulation carry on but there did not seem to be room in the overhead compartments.

SEA
YYZ
Okay 4.0

Air Canada's airplane cleanliness is second to none in my book. That's why I always fly with them... Or rather flew...

The unending stream of excuses and explanations failed to convince me that this was anything but mismanagement that caused a delay of 5 hours. We'd be told something, and told the exact opposite, or a contradicting statement 15 minutes later. You botched this one bad Air Canada.

Sat, Feb 3
SEA
YTZ
8h 41m
Sat, Feb 10
YTZ
SEA
10h 49m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
SEA
YTZ
9h 35m
Mon, Jun 4
YTZ
SEA
11h 36m
Trip: 5 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 20974 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.4
YYZ
YVR
Okay 4.6

The movies and entertainment offered in the screen were alright.

We were delayed over an hour because flight got in late from Halifax, I get it, stuff happens. Then once boarded we sat there for another 45 minutes. The pilot comes on over the speaker and explains we aren't leaving because the crew didn't have the proper paper work in the cabin...

YUL
YBC
Good 6.0

Pleasant personnel

Old and rusty aircraft that seems to be taken care with the strict minimum.

YUL
YYZ
Mediocre 2.0

There is nothing to like about Air Canada anymore.. unless you happen to like the abuse and indifferent service. Employees seem disengaged.

AC used to be mindful or customers with connections. This is the reason I booked all segments with air canada. Found out the hard way it is no longer the case. Lesson learned. Missed connection and ended up on stand by for the next flight ( no more protected seats folks). Was not even refunded the money paid for seat assignment on the missed connection.

YVR
YYC
Mediocre 3.6

OK service

was not offered a direct flight to Vancouver when it was obvious that I would miss the connecting flight.

YYZ
LAS
Mediocre 3.3

The extra $50 seats were roomy.

Flight was delayed and no one knew why!... Plane had been sitting ready at the airport for hours. Novice flight attendants, they each picked on different things others missed just before them. No consistency, seats left reclined during takeoff and landing for example. One way there was drink service once even though it was a smooth flight and the return had drink service twice even though it was bumpier! Entertainment does NOT work on androids, it is NOT the AirCanada app they tell you to download prior to the flight, it's an AirCanadaRouge.pk file that needs to be downloaded in flight! Which means we're stuck paying for the iPad and of course only with cc because there's no wifi for debit cards.... AC needs to stop this insanely mediocre and yet expensive monopoly.

Wed, May 2
SEA
YYZ
6h 30m
Thu, May 10
YYZ
SEA
8h 10m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jun 5
SEA
YTZ
9h 35m
Tue, Jun 12
YTZ
SEA
12h 36m
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 20974 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.4
YUL
GVA
Mediocre 2.0

Nothing

Canceled flight , delayone day , I should rebook by myself by calling the air canada call center I will considre next time when reseving with Air Canada , and Kayak because you didn't even know what happen with me , I took flight to London next day since my flight was canceled

YYZ
LAS
Mediocre 3.3

The extra $50 seats were roomy.

Flight was delayed and no one knew why!... Plane had been sitting ready at the airport for hours. Novice flight attendants, they each picked on different things others missed just before them. No consistency, seats left reclined during takeoff and landing for example. One way there was drink service once even though it was a smooth flight and the return had drink service twice even though it was bumpier! Entertainment does NOT work on androids, it is NOT the AirCanada app they tell you to download prior to the flight, it's an AirCanadaRouge.pk file that needs to be downloaded in flight! Which means we're stuck paying for the iPad and of course only with cc because there's no wifi for debit cards.... AC needs to stop this insanely mediocre and yet expensive monopoly.

FLL
YUL
Mediocre 2.0

Pas assez de films et séries en français . Pas assez de comptoir Nexus en fonction à l’aer De montreal(2 seulement)

YVR
YYC
Mediocre 3.6

OK service

was not offered a direct flight to Vancouver when it was obvious that I would miss the connecting flight.

HKG
YYZ
Mediocre 3.6

Our flight from Toronto to Houston was cancelled. The staff at the arrival counter was very slow and rude. We wanted to leave by the United flight which was leaving in an hour or so but the supervisor was not willing to do anything. We ordered Asian vegetarian food and it was horrible. Never again Air Canada.

Tue, Jun 5
SEA
YYZ
7h 47m
Tue, Jun 12
YYZ
SEA
8h 05m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jun 6
SEA
YYZ
6h 30m
Wed, Jun 13
YYZ
SEA
8h 15m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jun 26
SEA
YYZ
8h 12m
Thu, Jul 5
YYZ
SEA
8h 15m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jul 1
SEA
YYZ
6h 30m
Thu, Jul 5
YYZ
SEA
10h 05m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Jul 2
SEA
YYZ
8h 12m
Thu, Jul 5
YYZ
SEA
10h 05m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Apr 8
SEA
YYZ
12h 35m
Sat, Apr 14
YYZ
SEA
8h 07m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Jan 26
SEA
YYZ
7h 59m
Fri, Feb 2
YYZ
SEA
8h 51m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Show more results

Seattle/Tacoma Intl to Toronto Flight Information

Avg. Flight Duration 4h 58m
Flights Arrive in Toronto
Flights Depart from Seattle/Tacoma Intl
Flight Price $276
Distance 2066 miles
Airlines Delta, Air Canada
*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.