YYC-LHR earned me 4359 on AC, so will take you to 15964 if you're earning at the same x1.0 rate
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I thought I'd double-check...
seems crazy to miss it by short a margin, right. I'll be doing a return, but thought that the status miles will disappear when I go to silver, so was eager try and make it on that first flight.
Presumably you mean Silver benefits here. I'm not sure there are any on AC itself: just about the only benefit for *S is from the 'home' programme's lounges.
If you mean the bonus destiation miles then you'll have to wait a bit longer to get them
, but its only 1000 or so which you can buy if it was make or break for a redemption.