as for ha, they aren't going to dip the prices if they don't have to, and if they do, i'd expect the first of it to happen around october, and then a final dip just a week or a few weeks out. if you need to fly, you should buy now. there will be at least a few last minute deals, but they will be unpredictable.
you can always check ha's "apparent" (too long a story) inventory by starting to make a booking and just taking it far enough (name, phone and email) to be able to see the seat map.