Complete the quest, "A Thief's Reward", by stealing the flames from your enemy's capital cities.

Alliance:
Stormwind - Outside Stormwind Stockades - 50, 72
Ironforge - Hall of Explorers - 64, 24
Darnassus - Between Warrior's Terrace and Tradesman's Terrace - 63, 47
The Exodar - The Crystal Hall - 41, 25 -This is a no fly zone

Horde:
Orgrimmar - On the upper level of Valley of Wisdom- 46, 38
Thunder Bluff - On the Spirit Rise - 21, 27
Undercity - In the courtyard before entering the city - 68, 7
Silvermoon City - Court of the Sun - 68, 41 -This is a no fly zone