In Star Trek, a subspace corridor is a wormhole-like passage through subspace, which allows a starship to travel over great distances in a short time. In the 21st century, there was a subspace corridor in the Delphic Expanse, extending 11.6 light years from a nebula controlled by the Kovaalans to not far from the Xindi Council planet. In February of 2154, Enterprise used this corridor to travel quickly to the Council planet. (ENT: "E²")

In an alternate timeline, Enterprise traveled through the corridor with a damaged impulse manifold. The particle wake destabilized the corridor, causing it to shift in time. The ship emerged in the year 2037. Fortunately, this was avoided when that Enterprise assisted the 2154 version of the ship in making alterations to the impulse manifold.

There is a vast network of subspace corridors in the Delta Quadrant known as the Underspace. The Vaadwaur discovered and charted the Underspace, using them to travel throughout the Delta Quadrant. In 2376, the Federation starship USS Voyager's warp field interacted with one of the corridors, and it was pulled through a breach in the radial wall. The Turei expelled them from the corridor, but then demanded to board Voyager to eliminate all evidence of the Underspace. The Vaadwaur offered to cooperate with Voyager, to show them corridors of which the Turei have never been aware. However, their desire to regain their former power ultimately led them to attempt to capture Voyager and its advanced technology. Voyager defeated them with help from the Turei, and the remaining Vaadwaur ships fled into the Underspace. (VOY: "Dragon's Teeth")

In 2377, Reginald Barclay speculated that a group of Ferengi may have found either a wormhole or a subspace corridor to bring Voyager to the Alpha Quadrant, before realizing that they were planning to utilize a geodesic fold. (VOY: "Inside Man").

The closest equivalent to subspace corridors in astrophysics appear to be wormholes and may in fact be subspace equivalents of wormholes in normal space. It is not explained what makes subspace corridors different from other wormholes encountered in the Star Trek world. The theory developed by Fabrice Petit of the Belgian Ceramic Research Centre and Michael Sarrazin of the Facultés Universitaires Notre-Dame de la Paix, in Belgium, in September 2007 certainly describes what amounts to shortcuts through extra 'subspace' dimensions.