The closest Underground Station is Earls Court, which is on the District and Piccadilly lines. From The Rockwell a walk to the Underground will take less than 5 minutes.
By Public Transport
From Gatwick Airport:
The Gatwick Express train service leaves Gatwick Airport every 15 minutes and takes 30 minutes to arrive at Victoria Station. Victoria Station is accessible from the Underground station at Earls Court.
From London Heathrow Airport:
The Heathrow Express train service leaves Heathrow Airport (terminals 1, 2, 3 and 4) every 15 minutes, and takes 15 minutes to arrive at Paddington Station.
From Stansted Airport:
The Stansted Express train service leaves Stansted Airport every 15 minutes during the week and every 30 minutes during the weekend. It takes 45 minutes to arrive at Liverpool Street Station.