Unsupported flight

"And then Harry saw him. Voldemort was flying like smoke on the wind, without broomstick or thestral to hold him, his snake-like face gleaming out of the blackness, his white fingers raising his wand again —"

- Harry Potter witnesses the first known instance of a wizard flying unsupported

Unsupported flight (incantation unknown) is a spell that allows a witch or wizard to fly without the use of a broomstick or other form of support. The spell was created by Lord Voldemort.

Early attempts
"No spell yet devised enables wizards to fly unaided in human form. […] Levitation is commonplace, but our ancestors were not content with hovering five feet from the ground. They wanted more. They wanted to fly like birds, but without the inconvenience of growing feathers."

- Kennilworthy Whisp, Quidditch Through the Ages.

Attempts to fly unaided have been made by wizards since ancient times. Levitation has been possible at least since the invention of the Levitation Spell in ancient England, and an attempt to improve upon this and achieve true flight made by Jarleth Hobart in 1544 led to the invention of the Levitation Charm. The flying broomstick, which allows wizards to fly with relative ease and convenience, was invented around 962 A.D., and seemed to satisfy most wizards' desire to fly. True, unaided flight of a human being, however, was long considered a magical impossibility, discounting any animagi whose form take on flight-able species.

Invention
Sometime prior to 1997, Tom Riddle succeeded where other wizards had failed and managed true flight. He first publicly showed off this ablity during the Battle of the Seven Potters, using the spell to great effect and almost managing to defeat Harry Potter if not for an odd reaction with their wands. He also taught this spell to Severus Snape, who used it to safely escape from Hogwarts shortly before the Battle of Hogwarts. Some Death Eaters also seem to know it, most likely taught by Lord Voldemort and then passed on.

Nature
Unsupported flight is different from levitation, which only allows objects to fly a few feet off the ground and does not work on humans. Unsupported flight was specifically designed for human use thus giving one the ability to fly from far up without the aid of an object. It is unknown how long a person can stay airborne or if it works over vast distances.

Practitioners

 * Lord Voldemort
 * Severus Snape
 * Bellatrix Lestrange
 * Fenrir Greyback
 * several other Death Eaters

Behind the scenes

 * In the Harry Potter films, Apparition is often depicted as similar to flight, with those using it even able to cast spells, physically fight, and affect the stability of the Millennium Bridge mid-"flight". As it is portrayed in the books, however, this sort of application of Apparition would be impossible, and thus this cannot be considered canon.
 * Non-beings, such as Dementors and Poltergeist, can fly through the air without any form of physical aid.
 * Ghosts are capable of flight without any physical supports.
 * In the film adaption of Harry Potter and the Philosopher's Stone, Quirinus Quirrell was flying without any visible support towards Harry in the last of the seven Underground Chambers, most likely due to Voldemort possessing him.

Appearances

 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 1
 * Harry Potter and the Deathly Hallows: Part 1 (video game)
 * Harry Potter and the Deathly Hallows: Part 2
 * Harry Potter and the Deathly Hallows: Part 2 (video game)
 * LEGO Harry Potter: Years 5-7
 * Quidditch Through the Ages
 * Wonderbook: Book of Spells

Notes and references
pt-br:Voo sem suporte