As written; TftD, Sweep Attacks, and even bomb squigs should be able to hit flyers. That's a tenuous "should" with many dissenters of course, the most important one being
GW itself. Never mind that Hard to Hit only mentions Shots. As was said earlier:
foolishmortal wrote:
I don't want a faq entry on LotS. I want errata on Hard to Hit. 
Don't ask
GW to mop up the floor. Ask them to fix the roof.
Until such a time as this happens, every special rule in the books is going to spawn an argument somewhere in the world.
My feelings on LotS is that techno-lightening should be able to down aircraft in fiery glory. We'll see what
GW has to say on that soon, I hope.
Perhaps we can take tacit approval in that
GW hasn't said LotS can't hit flyers. They've taken time to mention a lot of other contenders...