There are one airlines offering flights to Toronto. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly. The cheapest date is currently 11 / Mar / 2020.
Toronto City Centre Airport is just one of the airports in Toronto. If you're not set on a specific airport, try changing your search from Toronto City Centre Airport to Toronto to see a broader range of flights – they might be cheaper. It usually takes about 16 hrs 5 mins to fly 5576 km to Toronto City Centre Airport.
There are about 24 flights to or via Toronto every week, so you have plenty of options.
During this peak season, accommodation prices often increase too, so it's best to book early. Or you could keep your fingers crossed and hold out for a last-minute deal.