score:3
Upvote:1
While these statistics are relatively easy to come by for US airlines (and some other countries), I couldn't find anything specific to Air Canada.
Typically, cancellation rates are somewhere between 2% and 5%. There is a very good chance that Air Canada's cancellation rate sits in this range as well. Your 50% rate is an outlier and just bad luck. Cancellations are expensive for the airlines so there is a good incentive for them to minimize cancelled flights.
It's also not clear what the goal of your question is? What would you do differently if AC average rate was 0.5% or 10% ?
Upvote:2
Cancellation rates are not constant over longer periods: cancellations tend to happen in groups.
So you could book 100 flights one month and the same 100 flights a month later and have completely different results.
In any case, 4 flights is definitely not a representative sample, especially if flights are somehow linked (the same aircraft or crew would have served two or more flights) or there is a large scale disruption around (severe weather events).
If you want to take this further, you could book a single flight, and then you would have either 0% or 100% cancellation rate. As you can see, neither is representative.