Most Canadian Airports actually start with a "C". For example CYVR, CYYZ, CYXU, CYHM, etc.
Many of the higher traffic and larger airports have the "Y".
There are many other airports that do not have the Y, such as CNB9 (Barrie, ON), CNBB (Boundary Bay, BC).
Often the "C" is left out and it is just YVR, YYZ, NB9, NBB, etc.
Y, I don't know.
What's another word for thesaurus?