Greater Anglia operates a train from Chelmsford to Waterloo Station every 15 minutes. Tickets cost $13 - $19 and the journey takes 27 min. London Underground (Tube) also services this route every 5 minutes. Alternatively, National Express operates a bus from Chelmsford to Waterloo Station twice daily. Tickets cost $7 - $11 and the journey takes 1 h 25 min.
From Chelmsford train to Stratford Underground Station then Tube to Waterloo Underground Station. 47 min £14. From Chelmsford bus to London Waterloo Rail Station then walk to Waterloo Station. 1 h 29 min £7. From Chelmsford taxi to Waterloo Station. 51 min £146. From Chelmsford drive to Waterloo Station. 51 min £6.