Kes's starship was a small vessel of unknown origin used by Kes.
In 2376, Kes crashed her vessel into the hull of the USS Voyager, so she could board it and use Voyager's warp core to travel back in time to 2371. After viewing a hologram of herself recorded five years before asking her to stop her malevolent ways, Kes ceased her actions. Afterward, she went back on her ship and was planning on using it to return to her homeworld, Ocampa. (VOY: "Fury")