London Travel Connections to/from Stansted Airport:

UNDERGROUND: Baker Street (Circle, Metropolitan, Bakerloo, Jubilee and Hammersmith & Circle Lines)

TRAINS: Paddington, Euston, Marlyebone, King's Cross St. Pancras

You can also plan your onward journey to your destination through this Transport for London and Transport Direct (covers all the UK)travel planner. Simply enter your destination information as required and it will provide you with all public transport connections and possibilities.