Chiltern Railways operates a train from High Wycombe to Marylebone every 30 minutes. Tickets cost $17 - $26 and the journey takes 25 min. Alternatively, National Express operates a bus from High Wycombe to Marylebone 4 times a day. Tickets cost $7 - $11 and the journey takes 1 h.
From High Wycombe train to London Marylebone. 25 min £16. From High Wycombe Coachway, Handy Cross bus to London Marble Arch. 1 h £7. From High Wycombe, High Street (Corporation Street) bus to Uxbridge Underground Station then Tube to Baker Street Underground Station. 1 h 19 min £8. From High Wycombe taxi to Marylebone. 38 min £129. From High Wycombe drive to Marylebone. 38 min £5.