There is a train station under the terminal, the Stansted Express (tel: +44(0)845 850 0150) leaves every 15 minutes to Liverpool Street Station in London, travel time is 45 minutes, a train also goes to Cambridge and the Midlands.
Car and bus
The airport is along the highway M11, from London you take exit 8a and from Cambridge you take exit 8, you come to a roundabout where the route to the airport is clearly given. Colchester and Harwich are accessible from highway A120, Stansted Airport is also accessible from the M25, exit 27.
The bus station is between Zones C and D of the area for short-term parking. An express bus (tel: +44(0)870 575 7747) goes to various destinations in London (i.e. Stratford, Victoria Coach Station, Liverpool Street Station and Golders Green). Because of the heavy traffic in and around London the travel time can take up to an hour and a half (two hours at peak time). A bus also goes to various other destinations including Oxford and Cambridge.
Car rental - London Stansted Airport
You can rent a car from the counters in the Arrivals Hall from car rental companies: Avis, Budget, Europcar, Hertz and National/Alamo. You can also reserve a rental car in advance using the service EasyTerra provides, they compare the rates of several providers in a single quote.
Checkercars (tel: +44 (0)1279 661 111) is the only company that may operate at Stansted Airport. Taxis to London are not cheap, approximately £70.00. There is a counter in the Arrivals Hall where you can reserve a taxi.
There is an area for short-term parking, close to the terminal (Fast Track). It is especially recommended for business travelers that fly back the same day, the cost for 12-24 hours is £26.00. A little further away (200 m) there is another area for short-term parking (NCP), 30 minutes costs £1.50, further information about parking (tel: +44(0)870 850 2825). The Airport Parking Directory website offers a service where you can compare the rates of multiple Stansted Airport parking suppliers. They work together with Airport Parking Shop.