How to get to London from City Airport:

TUBE:

Canning Town - Jubilee Line extension to Canning Town with a shuttle bus connection to London City.Liverpool Street Station - Central, Circle, Metropolitan and Hammersmith & City Line. Shuttle bus connection to London City.

Bank Station - Connection via DLR to Canary Wharf. Airport shuttle bus to terminal.
Tower Hill Station - Connection via Tower

RAIL:
Silverlink Metro

Trains run from Richmond via Canning Town and call at Stratford, Highbury & Islington, Camden Road, West Hampstead and Willesden Junction amongst other stations. Connect to the airport via the 69 bus at Canning Town.

Docklands Light Railway
Link from Bank Station and Tower Gateway to Canary Wharf, connecting with the Airport Shuttlebus.
Link from Canning Town Station, Airport shuttle bus to the Terminal Building, or the 69 bus. The DLR also connects to Prince Regent Station and the 69 bus runs from here to London City. New Lewisham extension is now open. Link to London City Airport from Deptford, Greenwich and Lewisham via airport shuttle bus from Canary Wharf.

BUS:

Airport Bus Stop A - To Stratford for connections to Central London and for Prince Regent Docklands Light Railway Station.

Airport Bus Stop B - To North Woolwich and Woolwich Ferry and for Silvertown & London City Airport Station. Rail - (Silverlink Metro).
69
Running to/from Walthamstow Central underground station (Victoria Line) to London City Airport via Stratford, Plaistow & Canning Town
474
Running (Monday to Saturday, every 20 minutes on Sundays to/from Canning Town to Becton with a request stop at the airport entrance road (3 minutes walk).