Say that for whatever reason, a martial character can't use any projectile (sling, bow, etc.) or thrown (javelin, bloodstorm blade's Throw Anything, etc.) weapons.
The whole region is also covered in a constant antimagic field, so supernatural attacks like the fan the flames maneuver won't work (not that 30 feet is really going to counter most flying enemies), nor will a potion of fly or a magic sword with some sort of ranged special ability. It would also be a waste to take a spellcasting class and become a dragon disciple, since this is a martial character, and they live in an antimagic field.
And obviously the character isn't of a race that has a fly speed of its own, because that would make it a non-issue. Let's say they're human.
Is there any way for the character to attack flying enemies (especially flying, ranged ones) from the ground, or bring the enemies down to the ground, or bring themselves up to the enemies in the sky (who we can assume are beyond any reasonable jump check and aren't dumb enough to hang out near climbable walls)?
Courtesy of @HeyICanChan, an example situation can be thought of as, "How can a naked and unarmed human engage in battle with a flying opponent that's making ranged attacks against the human from 180 ft. up while both are in an area of antimagic?" Melee weapons are actually okay, but if it can be done without any equipment, that's a plus. Assume the flying creature is a winged monster (like a harpy) with a mundane ranged weapon, but that the character would like to deal with the monster in the fewest number of rounds they can (so waiting for the harpy to run out of arrows and start making melee attacks is far from ideal). Also assume that this is a recurring situation that can happen in various locations within the character's home region, so preparation like grafts and class levels are okay, but once the monster shows itself, the human wants to be able to begin fighting it within a couple rounds.
As for a couple background specifics: I thought at first that maybe the human would've made some rather unusual oath to abstain from ranged combat, which can probably be thought of as a reason for that. Alternatively, consider that this is just a very cautious adventurer who wants to ensure that they have a backup for when they do run out of ammunition while in an area of antimagic (incidentally, this is the actual reasoning for which I'd use the answers, myself). As for the antimagic field itself, assume it spans several miles in each direction, perhaps for some political reason or as a safeguard against some underground network of crypts for dead wizards or something.
I'm expecting that this will rely on extraordinary class features or feats (which we'll say are all available, unless they have a magical/non-human prerequisite), but there could be some other type of solution, I dunno. (Not 100% sure on the tags because I don't know what sort of features will work)