Hello everyone,

I've booked a YUL-AMS aeroplan reward ticket but the date I chose wasn't the one I preferred. I had to book it because I was seeing the seats I wanted going away. Now, I see availabilities on other dates, which weren't there at time of booking.

I really wonder how these seats are released.

Is it because of cancellations or do the airlines release more seats progressively? Also, any tips I can use to foresee if seats will be made available?

Thanks a bunch!