Green Line (operated by Arriva) operates a bus from Hemel Hempstead to Oxford Circus hourly. Tickets cost $10 and the journey takes 49 min.
How to get from Hemel Hempstead to Oxford Circus
From Hemel Hempstead train to Euston Underground Station then Tube to Oxford Circus Underground Station. 36 min £11. From Adeyfield, School bus to Marylebone, George Street (W1). 49 min £6. From Hemel Hempstead taxi to Oxford Circus. 32 min £109. From Hemel Hempstead drive to Oxford Circus. 32 min £4. From Hemel Hempstead rideshare to London. 52 min £4.