Flight Deals from Seattle to Toronto from $108

Flights from Seattle to Toronto are most expensive from late May to early June and cheapest in late February to early March.

When planning your flights from Seattle to Toronto, consider that prices fluctuate significantly throughout the year. The most expensive period typically occurs from late May to early June, where prices can peak, especially around the end of May. In contrast, you will find the lowest fares during late February and early March, especially around the early part of March. Expect high prices during the summer and holiday season, while the best deals can be found in early spring and late summer, with a price difference that can range significantly between these seasons.

Book your Seattle to Toronto flight 41 days in advance for the best prices, as costs rise significantly closer to departure.

When considering your flight from Seattle to Toronto, the best time to buy is approximately 41 days before your departure, with prices around $314. Booking earlier may result in costs soaring to $651, making it 107% more expensive. After 41 days, you'll typically see a consistent rise in prices, with the last 20 days particularly volatile, where fares can escalate between $382 and $1,133. For added peace of mind, you might want to secure your tickets between 85 and 63 days prior, as prices during this window are still reasonably low, and you may enjoy better seat selection. If you find yourself within 20 days of travel, it's crucial to book immediately as prices can drastically increase, often reaching 197% more than the optimal booking window prices. Therefore, avoid waiting too long to purchase your tickets to ensure you get the best deal.