Gatwick Airport is just 30 minutes from central London via the non-stop Gatwick Express rail service with national rail links to destinations around Britain.

Gatwick Express
The Gatwick Express is the fastest rail link between the airport and central London. Non-stop trains run to and from London Victoria every 15 minutes with the journey taking just 30 minutes.
Other rail services - First Capital Connect
Trains run every 15 minutes to Brighton (via Mid Sussex) and to Bedford via East Croydon, London Bridge, St Pancras International and Luton. There are services to King's Lynn, Peterborough and Cambridge from St Pancras International.
Coaches
Frequent daily coach services connect Gatwick to more than 400 UK towns and cities. Direct services run to destinations including Heathrow, central London, Bristol, Brighton, Birmingham, Oxford, Cambridge and Norwich. These services operate from the upper South Terminal forecourt. The Heathrow-Gatwick National Express service drops passengers off right outside Departures at the North Terminal.
easyBus to London
A low-cost high frequency airport transfer service non-stop from London and Gatwick Airport. Non stop coaches depart every 15 minutes at peak times from the North terminal and from Fulham Broadway Underground station offering convenient access to Central London and connections at Victoria Station. Buses depart between 06:00 and 23:00, seven days a week except Christmas Day.
Local buses
Local buses run between Gatwick and destinations including Crawley, Horley, Redhill and Horsham. Buses call at both terminals.
If you are using a satellite navigation system here are some useful postcodes:
South Terminal: RH6 0NP
North Terminal: RH6 0PJ