[Suteisi]

I went to see Ayu in October 2009, I bought my ticket in April. It was the best deal I'd ever seen, 950$CAD for a round trip ticket. Normally they go for 1,200-1,500$!!

So it really depends on the season you're going, from where your departing, where you're landing, etc. I would advice against waiting at the last minute, just keep looking every other day if not every day, you don't really have anything to loose by starting your search early on. Worse comes to worse you'll just buy a ticket later rather than sooner...

I noticed summer and Christmas holidays are the busiest. I'm planning to attend CDL12-13 so I'll probably be looking at tickets in June to get a heads up.