An Al-Leyan transport was a type of transport utilized during the latter half of the 24th century.

In his search for the ancient humanoid DNA-puzzle, Richard Galen wanted to gain passage to Caere on an Al-Leyan transport from Deep Space 4. (TNG: "The Chase")

According to, Al-Leyan was the name for a species.
According to the Star Trek Encyclopedia (4th ed., vol. 1, p. 15), this transport was of Al-Leyan registry.