London Buses route 643 is a Transport for London contracted bus route in London, England. Running between Brent Cross and East Finchley, it is operated by Metroline.
On 28 June 2003, the route passed to Metroline operating from their Cricklewood (W) garage using Alexander ALX400 bodied Dennis Tridents.
On 28 June 2008, the route was retained by Metroline.
On 29 June 2013, the route was retained by Metroline.
- Brent Cross Shopping Centre
- Hendon Central Station
- East Finchley Cemetery