A teleportation spell is a form of magic that instantaneously transports an individual from one location to
Mary Collins uses a teleportation spell.
another.
Mary Collins used such a spell to evade arrest after swearing revenge on Uther and Arthur Pendragon following the execution of her own son, Thomas Collins. She used an amber amulet as the source of magical energy necessary to accomplish the spell (The Dragon's Call).
Its possible that Nimueh used a teleportation spell in two different occasions: non-verbally to send an egg with the Afanc through her scrying fount to the water vaults of Camelot (The Mark of Nimueh). She then used this spell to appear and disappear in the castle when she talked to Uther (Excalibur).
Morgause later used a teleportation spell to transport herself and Morgana away from Camelot after a failed invasion of the Castle. The spell she used was: "Bedyrne ús! Astýre ús þanonweard!" (The Fires of Idirsholas).
Morgause takes Morgana away with a teleportation spell.
When Merlin gave the Fisher King a Phoenix Eye so that he could finally die, the ancient king was surrounded by a whirlwind with his robes flying around in the air in rags, just like if he had chanted a teleportation spell (The Eye of the Phoenix).
It is possible (though not very likely) that right at the end of Arthur's rebellion of Camelot Morgana cast this spell (that somehow she had learned) to escape from Camelot with her almost lifeless sister (The Coming of Arthur: Part Two).
After Morgana was hit by Merlin's stunning spell and apparently knocked out, with the stone ceiling falling over her, she disappeared into thin air. She was later on found into the woods, where she was healed by the young dragon Aithusa. It's unknown, however, if this teleportation spell was performed by Morgana herself, accidentally by Merlin or by someone else (The Sword in the Stone: Part Two).