Originally Posted by
Stranger
That may be true in the US. I once asked my corporate TA about this, and if they still would want me as a customer if I did that sort of thinks and was told in no uncertainty terms that yes, I could and they would not care at all. So I don't believe AC does that.
Last year, there was a glitch in the computer system in AC. My TA was able to get a YYZ-HKG-YYZ-EWR for $500 less than YYZ-HKG-YYZ for my father-in-law. He skipped the YYZ-EWR portion on his way back with no problem because his luggage needed to clear custom at YYZ. A few months later, my TA told me that some (but not all) travel companies received letters from AC asking them to pay the price differences. She did not know whether they actually did pay or not or they charge it to their customers.