$167 Cheap Delta flights Toronto (YYZ) to Seattle (SEA)

You can discover cheap return Delta Air Lines flights from $271 from YYZ to SEA by filtering your results from “Price (lowest to highest)” on Expedia. Or look for bargains from $167 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for one-way or round-trip flights to Seattle in January or February. You could find an affordable fare with Delta Air Lines during these quieter months.

To grab affordable flights from YYZ to SEA with Delta Air Lines, begin your search about one month before your planned departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Want another tip? Booking on Sunday offers average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use our “Nonstop” filter when searching for direct Delta Air Lines flights from YYZ to SEA. It’s also an easy way to compare other airlines servicing the same nonstop route.

To find the earliest departures from YYZ to SEA with Delta Air Lines, filter your results by “Morning” and “Early Morning.” Booking an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Seattle - Tacoma Intl. Airport (SEA) is the main Seattle gateway for Delta Air Lines flights from Pearson Intl. Airport (YYZ).

Flying from YYZ to SEA with Delta Air Lines comes with a host of perks, including an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can collect OneKeyCash™* to redeem on select future travel purchases. That’s in addition to the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee may apply if you cancel or reschedule your flight more than 24 hours after it’s been confirmed. To find flexible plane tickets, select our “Changes included” and “No cancel fee” boxes when looking for flights. To learn more about canceling or modifying your reservation, visit “Trips,” select your flight and tick “Manage Booking.”