From Broadstairs train to St Pancras International, walk to King's Cross St. Pancras Underground Station, then Tube to Covent Garden Underground Station. 1hrs 34min £41. From Broadstairs bus to Lewisham, Lockmead Road then night bus to Covent Garden, Savoy Street. 3hrs 25min £13. From Broadstairs drive to Covent Garden. 1hrs 33min £19.