Originally Posted by
CCFP
Do NOT do this because Tango fares are non-refundable as per the
AC website.
That applies after 24 hours. Any standard AC revenue ticket, when booked directly through them (either online or over the phone), is completely refundable within 24 hours.
The only exception I know to this is a flight pass, which is refundable only within 2 hours (unless it's a Latitude flight pass).