| 21 | Chester le Street to Durham | Mon to Fri (1 trip) Sat (2 trips, 1 back) | Gateshead | | N21 | Durham (City Centre Circular) | Evenings only, one way, Sat (1 trip) Sun (1 trip) | Gateshead | | 21 | Newcastle upon Tyne to Chester le Street | Mon to Fri (65 trips, 68 back) Sat (every 15 mins) Sun (every 20 mins) | Gateshead | | 21 | Newcastle upon Tyne to Durham | Mon to Fri (74 trips, 68 back) Sat (every 15 mins) Sun (every 30 mins) | Gateshead | | 21 | Newcastle upon Tyne to Bishop Auckland | Evenings only, one way, FriSat (1 trip) | Gateshead | | 21 | Newcastle upon Tyne to Bishop Auckland | Evenings only, one way, Mon to Sat (3 trips) | Gateshead | | N21 | Durham to Chester le Street | Evenings only, one way, Sat (1 trip) Sun (1 trip) | Gateshead | | N21 | Newcastle upon Tyne to Chester le Street | Evenings only, one way, Sat (1 trip) Sun (1 trip) | Gateshead | | N21 | Newcastle upon Tyne to Durham | Evenings only, one way, Sat (4 trips) Sun (4 trips) | Gateshead | | N21 | Durham to Newcastle upon Tyne | Evenings only, one way, Sat (4 trips) Sun (4 trips) | Gateshead |