From Stansted Airport train to Tottenham Hale, train to Stratford International, then train to Chatham. 1hrs 25min £35. From London Stansted bus to Liverpool Street, line 135 bus to Poplar, Canada Square North, then line 722 bus to Gillingham, Victoria Street (Gillingham Rail Station). 2hrs 51min £18. From London Stansted Airport (STN) drive to Chatham. 57min £10.