Re: SpaceX ate my homework
Actually for once Qantas arent actually wrong here. I know, it feels weird typing that!
Although the odds of a plane being hit by debris are extremely low, the cost of 300 lives means that usually the airspace where the debris is expected to fall is closed completely.
If that Info comes too late, Qantas has to change the flight path to go around the area, refile flight plans, likely add more fuel, check new and different areas weather reports, check that they are not going to be impacting another Aircraft's flight paths, etc. It is a fair amount of work, most of it regulatory in nature, meaning it's as slow as a wet week in the west of Wales.
AND there is no reason for Space X not to put the advisories out significantly earlier. It's not like they decide on the spur of the moment to ditch the rocket. These things are planned meticuluosly months in advance. Just be a good world citizen put your advisories out early, and Qantas can go back to finding other excuses for being late...