Seattle to Toronto SEA → YYZ
Seattle-Tacoma International Airport (SEA) → Pearson International Airport (YYZ)
The cheapest return found recently is $611 with WestJet, 23 Oct – 25 Oct, found today.
Return
The cheapest return fare on each of 4 departure dates is usually $398 to $524.
Cheapest return found recently
$611
23 Oct – 25 Oct · WestJet
Seattle-Tacoma International Airport (SEA) → Pearson International Airport (YYZ)
Leaves 11:10 p.m. · Return leaves 9:00 a.m. · 34 h 48 min of travel, both ways together
out 1 stop, back 1 stop
found today
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$611 23 Oct – 25 Octfound todaySee prices for these dates
$360 6 Nov – 8 Novfound 6 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $307 to $476.
At $611, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 23 Oct to 26 Nov, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 2-night return fares leaving within 3 days of 23 Oct to compare.
Every date we hold
6 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Oct – 25 Oct | $611 | WestJet | Seattle-Tacoma International Airport (SEA) → Pearson International Airport (YYZ) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 2 Nov – 3 Nov | $495 | WestJet | Seattle-Tacoma International Airport (SEA) → Pearson International Airport (YYZ) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 6 Nov – 8 Nov | $360 | WestJet | Seattle-Tacoma International Airport (SEA) → Pearson International Airport (YYZ) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 26 Nov – 1 Dec | $410 | WestJet | Seattle-Tacoma International Airport (SEA) → Pearson International Airport (YYZ) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $360.
Airlines on the cheapest dates: WestJet.
Premium cabin fares from Seattle to Toronto
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 23 Oct – 25 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seattle to Toronto?
Return
Fares 14 to 29 days before departure were typically 40% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $602 | $557 | +67% | 9 |
| 14–29 days | $360 | $307 | Cheapest seen | 23 |
| 30–59 days | $405 | $327 | +13% | 25 |
| 60–89 days | $527 | $527 | +46% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Victoria → Toronto
119 km from Seattle
C$229 (US$162)
26 Oct · YYJ → YYZ · nonstop
found 3 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 23 Oct – 25 Oct. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work