An inhabited Delta Quadrant planet recommended by Neelix early in Voyager's journey, towards which the ship is travelling when it becomes trapped in a quantum singularity in the episode Parallax.
Ilidaria is an inhabited world in the Delta Quadrant and the home of the Ilidarians. It is spoken of in the Voyager episode Parallax but never shown on screen.
In 2371, only days after Voyager is stranded, Neelix suggests the planet as a place to trade and describes its people as technologically sophisticated and friendly most of the time. The ship is on its way there when it picks up what appears to be a distress call and is caught in the event horizon of a type-4 quantum singularity less than three light years from the planet.
The crisis occupies the rest of the episode, in which B'Elanna Torres earns her post as chief engineer, and the visit to Ilidaria itself takes place off screen.