Best I see currently for this trip is $1174 USD (Faregeek.com on BA, 1 connection each way — at Heathrow). That seems steep for off-peak, but… Italy (and Spain) can be high into September, and it is from Vancouver (and there are fuel surcharges on currently). So… personally, I’d give it a while; sign up for fare alerts with Bing, Farecompare, and/or Airfarewatchdog, get good at checking it myself daily (with a site like Fly or Kayak.com) in case the email alerts are delayed, and be ready to book when something good pops up. I’d probably jump at the first thing under $1000; might it go under $900—maybe, but I think it less likely; could it go above $1200?—again, maybe, but I think that’s the high end for this route at this time of year; there comes a point where people are not willing to pay it, and I think that’s probably close to it — for this route, at that time of year, based on historical fare trends, load factors, and fuel surcharges.