The Comet (The Comet 614 and 644) are a pair of bus services operated by Uno in Hertfordshire, England.

In March 2017, routes 614 and 644 were extended from Hatfield Business Park to Hatfield station, replacing service 600 which was simultaneously withdrawn.^[1]

The brand was introduced in September 2017, coinciding with the introduction of six new Alexander Dennis Enviro400 City double-decker buses.^[2][3][4]

Route 614 starts at Queensbury station and passes through Edgware and Chipping Barnet, though it avoids Edgware bus station. It subsequently runs on the A1(M) motorway before reaching Hatfield, where it passes the University of Hertfordshire. The route ends at Hatfield station.^[5] Route 644 takes a similar route, but instead of passing through Chipping Barnet, it instead passes through Borehamwood.^[6]

The routes are named after the de Havilland Comet, the world's first commercial jet airliner. The airliner was developed at the Hatfield Aerodrome.^[2]