User blog comment:Saarocker/Longest Abilities' Ranges in the League/@comment-6061249-20130327171108

Draven's Whirling Death. It's not global - though it can reach an enemy everywhere, it goes back automatically after some distance traveled, not sure how much is it.

Also, if it counts, Warwick has 4700 detection range at max level of Blood Scent.

And, some (or all?) abilities that reach + 1100 range and aren't global (not really sure why, but i realize 1100 range as some kind of minimum for "far range abilities"):

Corki's Missile Barrage - 1225 + a bit of AoE range

Galio's Righteous Gust - 1180

Graves' Collateral Damage - 1000 + 800

Irelia's Ionian Fervor - 1200

Leona's Solar Flare - 1200 + 125 (radius of AoE)

Lux's Light Binding - 1175

Maokai's Sapling Toss - though it has only 1100 range, sapling can follow an enemy much further.

Miss Fortune's Bullet Time - 1400

Morgana's Dark Binding - 1300

Nami's Tidal Wave (how could you forget about it!) - 2550

Nocturne's Duskbringer - 1200

Also, Paranoia's launch range - 3500 at 3rd ability level

Nunu's Absolute Zero - 1300 (diameter or radius? not sure)

Rengar's Thrill of the Hunt - 4000 vision radius

Rumble's The Equalizer - 1700 + 1000

Sejuani's Glacial Prison - 1150 + 450 AoE

Thresh's Dark Passage - possible pull up to 1500

Trundle's Contaminate - 900 + 500 radius

Also, Pillar of Faith - 1000 + 375 AoE slow range

Twisted Fate's Wild Cards - 1450

Twitch's Expunge - 1200

Viktor's Death Ray - 540 + 700

Vladimir's Tides of Blood - 1220

Zac's Elastic Slingshot - 1100 + radius of damaging AoE

Ziggs' Bouncing Bomb - 1400 max range

Also, Hexplosive Minefield - 900 + 250 AoE radius + 75 activation radius

Aaaaand, Mega Inferno Bomb - 5300 + 550 AoE radius

Zyra's Rise of the Thorns - 1500

It took me +/- 40 minutes to do the research.