Stansted Airport

The airport of Stansted is located 64 km north of London and is the most used by low cost flight companies such as EasyJet or Ryanair. That means a transit of more than 15 million people who arrive to London, either to visit the city or to use it as a stopover city to go to another destination.
If you are looking for flights on offer to Stansted visit this link.
This airport was born as a military air base in 1942 and today has a track of about 3,000 meters and the approval of an extension with three more tracks.
Transportation from Stansted airport
Given the distance of the airport from the center of London you will have no choice but to use some of the transport services from there to the city. The options are the following:
Stansted Express
It is the train that is available 24 hours a day, 7 days a week. It is a very fast train that will drop you off at Liverpool Street in less than 50 minutes.
The Stansted Express can be picked up at the station that you will find below the terminal of Stansted Airport. The trains run every 15 minutes, so the wait will be short.
It is the preferred transport for tourists arriving in London but it is not the cheapest option. The one-way fare is 19 pounds and if you choose roundtrip they are 32 pounds. Also, if you book 7 days in advance you can get the one-way ticket for 12 pounds and the round-trip for 24 pounds.
Terravision bus
This bus transports you from the airport to the Stratford tube station, located east of the city of London. The price varies between 6 and 8 pounds.
EasyBus
It is another bus service that leaves from Stansted Airport to the center of London.
A bus leaves every 25 minutes, approximately, and the journey time is 1 hour and 15 minutes.
The best thing about this option is the price because you can find one way tickets to the center of London from 2 pounds. The sooner you book, the cheaper the trip will go.
Taxis
Taxi services are present at any London airport but it is the most expensive means of transport ( 80-100 pounds bound for central London).
In short, the fastest transport that can be used to reach central London from Stansted Airport is, without any doubt, the Stansted Express train. However, if you want to save transportation costs you will not find anything cheaper than the transport service provided by EasyBus.