Air Canada makes it a bit difficult to find their phone number on their website and probably re-arranges their website too frequently which confuses the Google computer scripts.

So, here are the important Air Canada numbers, all on one page:
In Canada and the US, call 1-888-247-2262

How to Navigate the Air Canada Telephone Prompts

Press "1" right away for English
Then
"1" for checking departure and arrival times
"2" to search for flight fares