Darkmoon Faire Prize Ticket

The Darkmoon Faire Prize Ticket is a reward from the turn-in quests, and can be exchanged for prizes at the Darkmoon Faire. It stacks in stacks of 200; the most expensive items require 1200 tickets, or 6 full stacks.

Source
This item is a quest reward from the following quests:

Introduction to the Darkmoon Faire

 * , available at level 6
 * , available at level 6

Quests involving Leatherworking crafted items

 * , available at level 1
 * , available at level 10
 * , available at level 20
 * , available at level 30
 * , available at level 40

Quests involving Blacksmithing crafted items

 * , available at level 1
 * , available at level 10
 * , available at level 20
 * , available at level 30
 * , available at level 40

Quests involving Engineering crafted items

 * , available at level 1
 * , available at level 10
 * , available at level 20
 * , available at level 30
 * , available at level 40

Quests involving loot dropped from creatures

 * , available at level 1. Item acquired from Barrens.
 * , available at level 10. Item acquired from Ashenvale.
 * , available at level 20. Item acquired from Desolace and Badlands.
 * , available at level 30. Item acquired from birds of Eastern Kingdoms and Kalimdor.
 * , available at level 40. Item acquired from Eastern Plaguelands.
 * , available at level 40. Item acquired from Burning Steppes, Blasted Lands, and Silithus.

Quests available once the reputation limit is reached
See Darkmoon Faire Reputation for more information on the turn-in reputation limit.
 * , available at level 40
 * , available at level 40
 * , available at level 40
 * , available at level 40
 * , available at level 40

Darkmoon Faire Prize Ticket as a quest objective
This item is an objective for the following quests:
 * , available at level 6, rewards Darkmoon Flower
 * , available at level 6, rewards Darkmoon Storage Box
 * , available at level 15, rewards Minor Darkmoon Prize
 * , available at level 25, rewards Last Month's Mutton
 * , available at level 30, rewards Lesser Darkmoon Prize
 * , available at level 45, rewards Greater Darkmoon Prize
 * , available at level 45, rewards Schematic: Steam Tonk Controller
 * , available at level 45, rewards Last Year's Mutton
 * , available at level 60, rewards Orb of the Darkmoon
 * , available at level 60, rewards Amulet of the Darkmoon

(See Darkmoon Faire Prize review)

The Darkmoon Faire Ticket is a quest item; it is not currency, does not appear on your Currency tab, and cannot be used at any of the Faire vendors. It can only be turned in to for the above quests. Like all level-dependent quests, these will not appear until you reach the required level. For example, the Minor Darkmoon Prize becomes available at level 15, so a level-14 character will only see the quests for the Darkmoon Flower and the Darkmoon Storage Box. Also, as with other quests, in order to earn or redeem tickets, you will have to have an open slot in your quest log.