Toronto (YYZ) to Seattle / Tacoma (SEA) flight deal from $263 USD in economy class

ACAir Canada

Round Trip•Economy

YYZ

Toronto Pearson International Airport

Toronto, Canada

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$469 USD

-44%$263 USD

Verified Nov 5, 2025 at 7:38 AM

December 2025

Today

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1$301 2$263 3$263 4$271 5$271 6$301 7$309 8$301 9$263 10$294 11$271 12$301 13$294 14$356 15$356 16$356 17$405 18$437 19$565 20$694 21$597 22$573 23$578 24$497 25$497 26$631 27$535 28$578 29$535 30$608 31$445 1 2 3 4

Fair Availability

20% of dates checked are available within 10% of the lowest price

Tuesday, December 30th, 2025

10 round-trip options

Returning

Sun, Jan 4, 2026•5 Day Trip

$805 USD

Google Flights

Returning

Mon, Jan 5, 2026•6 Day Trip

$646 USD

Google Flights

Returning

Tue, Jan 6, 2026•7 Day Trip

$608 USD

Google Flights

Returning

Wed, Jan 7, 2026•8 Day Trip

$671 USD

Google Flights

Returning

Thu, Jan 8, 2026•9 Day Trip

$616 USD

Google Flights

Returning

Fri, Jan 9, 2026•10 Day Trip

$639 USD

Google Flights

Returning

Sat, Jan 10, 2026•11 Day Trip

$631 USD

Google Flights

Returning

Sun, Jan 11, 2026•12 Day Trip

$639 USD

Google Flights

Returning

Mon, Jan 12, 2026•13 Day Trip

$639 USD

Google Flights

Returning

Tue, Jan 13, 2026•14 Day Trip

$631 USD

Google Flights