I noticed that the Fly Techdex entry lists the moves that can hit a pokemon in mid-Fly, but the entry is missing some moves. Namely:

Jump Kick, Hi Jump Kick, Whirlwind, and...

Cross Chop. No, I'm not kidding, my Staraptor keeps getting hit by wild Machokes in mid-fly with Cross Chop. It makes the least sense of the list by far, but I've seen it happen all too often.[/url]

The reason it gets hit by Cross Chop is because Machoke's new ability "No Guard" makes all of its moves hit even during Fly, Dive, Dig, etc.

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That makes sense. I never thought about the ability causing it because Guts never matters and I hadn't known about the new possible ability for Machokes.

The other attacks I listed should hit Flyers regardless, unless I've forgot something there too.

You forgot about Sky Uppercut!