Yes, there are multiple flights from Lester B. Pearson Intl to Praslin for under C$ 2,282. The cheapest flight booked recently is on Multiple Airlines for just C$ 2,282, but on average you can expect to pay C$ 2,409.
There are no direct flights from Lester B. Pearson Intl to Praslin, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
With an average temperature of 32 °C, peak weather can be found in April. As a traveller, expect to see changes in flight prices during that period. The temperatures in Praslin are hotter than in Lester B. Pearson Intl.