Orbing: Up to the point Leo lost his powers, he possessed the ability to Orb. It allows the user to get transported to another location through the use of them. Over the years, Leo would be able to take two or more passengers with him.  and was able to healPhoebe in mid-orbing
Glamouring: Leo also had the ability to change one's face and form. Over the course of the series, he only used this power three times. He first demonstarted this power in 2000, to help train the girls for the incoming attack from Belthazor. . He then went on to help Darryl in 2003 and glamoured into a demon who was wanted for killing numerous witches.  The last time he used this power was in 2004, to trick the Elder, Gideon into thinking he was Barbas. 
Healing: Healing is the ability to heal injuries and wounds on other people. Throughout the series, Leo has healed numerous injuries to the sisters and became their own personal healer until Paige gained the power. He can also heal objects as-well, like pipes 
Telekinesis: Although only used once, Leo showed this power in 1999 in the Attic of the manor, he used it to open multiple boxes and crates before Piper walked in. 
Hovering: In early 1999, Leo first used this power on screen. He hovered a few feet in the air to change a light fixture. Although, he was caught out by Phoebe and was forced to tell her who he really was.  He then used the power just after Prue to meditate. 
Reconstitution: Reconstitution is the ability to pull yourself back together after being blown up. Leo can be seen using this power through the series. Piper blew up Leo in late 2003 and continuously blew him up two years later. 
Sensing: Sensing is the ability to locate magical and mortal charges. Leo used this power numerous times over the years. Most notable trying to find one of the sisters. 
Omnilingualism: The ability to speak and understand the language one of his charges speaks. In early 2004, Leo was able to read inscripiton on the genie bottle that was written in Arabic. 
Empathy: The ability to feel to a degree what their charges are feeling. However, if not skilled in this power it might actually hurt you. 
Thermokinesis: The ability to control and manipulate heat. Leo only used this power once, to warm up Phoebe's coffee when she first found out what he really was. 
Photokinesis: The ability to control and manipulate light. Leo used this power on his and Piper's wedding day. 
Dream Leaping: The ability to project oneself into someone else's dream and manipulate them. Leo used this ability to project himself into Piper's dream and to tell her that he's not coming back.
Cloaking: The ability to magically cloak himself and his charges to hide them from being found by evil.This is another version of Invisibility. Leo was able to cloak the future Whitelighter, Daisy so the DarklighterAlec wouldn't be able to find her. 
Electrokinesis: The ability to create strong forces of lightning and electricity. The most notable time Leo used this power was to kill the Elder Gideon.  He also used this power through Season 7. 
Invisibility: The ability to make oneself invisible to others. Leo first used this power to hide from the Titans and again to spy on his future son, Chris Halliwell. 
Super Strength: The ability to possess physical strength beyond humanly possible. Leo first used this power to beat up the Elder Gideon in the Underworld, tossing him across vast distances, with minimal effort.
Flight: The magical ability that allows a person to defy gravity and propel oneself through the air at great heights and speed. Leo achieves this through the angelic wings granted to him by the Empyreal Sword.
Agility: The ability that provides the user with inhuman agility, reflexes, and speed. While airborne, Leo displayed remarkable speed and agility during combat.
Calling: The ability to call an object into your hands. This ability is seen in beings who have a connection with their magical weapon they use.