London Buses route 603 is a Transport for London contracted bus route in London, England. Running between Muswell Hill and Swiss Cottage, it is operated by Metroline.
Route 603 commenced operating on 10 January 2004 between Muswell Hill and Swiss Cottage via Archway and Hampstead. The route was initially operated by Metroline from their Holloway (HT) garage using Plaxton President bodied Dennis Tridents.
On 11 January 2014, the route was retained by Metroline with Alexander Dennis Enviro 400s introduced.
- Muswell Hill Broadway
- East Finchley Station
- Highgate Village
- Hampstead Station
- Swiss Cottage Station