From High Wycombe Coachway, Handy Cross bus to Luton Airport. 1 h £8. From High Wycombe train to Baker Street Underground Station, Tube to King's Cross St. Pancras Underground Station, walk to London St Pancras International, then train to Luton Airport Parkway. 1 h 21 min £32. From High Wycombe taxi to London Luton Airport (LTN). 42 min £171. From High Wycombe drive to London Luton Airport (LTN). 42 min £7. From High Wycombe towncar to London Luton Airport. 42 min £127.