Directions :
From Heathrow International Airport: Take the Piccadilly line to Earls Court then change to the District line getting off at Bayswater.

From Gatwick Airport: Take the Gatwick Express to Victoria and then change to the Underground taking the Circle Line to Bayswater.

From Stansted Airport: 
Take the Train to Liverpool Street and then change to the Underground taking the Circle line to Bayswater.

More Information about the:
Heathrow Express
Gatwick Express

Stansted Express
London Underground