Another way, if you wanna go fast and if you don't want to kill everyone around you before trying that.
Start with Master Air for 90 ft - 12,000 gp for an all day custom magic item (Which most of these are, unless otherwise mentioned)
Haste increases it to 120 ft. (2,000 gp, from Trapsmith)
Aerial Alacrity increases it to 150 ft (Spell Level 4, CL 7: 56,000 gp)
Improved Speed (The Feat) increases it to 170 ft
Cloud Wings increases it to 200 ft (12,000 gp)
Get the trident that allows you to double your move speed.
Panther Mask for Run
You're moving at 400 ft/round, running at 2,000 ft/round.
Now the spell (in an item) Fly like an Arrow. It's from DR #308, good for dragons, but an artificer can put it in an item. Probably a staff/wand.
It multiplies your fly speed by 10 if you spend a round travelling in a straight line first.
20,000 ft/round. 3,333.33 feet/second, which is Mach 2.99 You're travelling as fast as a very speedy modern jet fighter. Probably not the fastest, but what I attached to my iron man a while ago.