Originally Posted by
Ldnn1
The reason you're not seeing it on the 23rd is because there is no O class on that flight using Canada point of sale on that date. That's why you can't find it on BA.com, since the website uses point of departure as point of sale. However if you use, for example, UK point of sale, there is O class on that date.
Ahh, that explains it! Thanks for the explanation.