From Heathrow Terminals 1-3 train to Paddington Underground Station, Tube to Oxford Circus Underground Station, Tube to London Euston, then train to Milton Keynes Central. 1 h 5 min £61. From Airport Bus Station line 99 bus to Central Milton Keynes, The Point (Central Milton Keynes The Point H4). 1 h £6. From Gatwick Airport train to Victoria Underground Station, Tube to London Euston, then train to Milton Keynes Central. 1 h 12 min £62. From Stansted Airport train to Tottenham Hale Underground Station, Tube to London Euston, then train to Milton Keynes Central. 1 h 19 min £54. From Birmingham International train to Milton Keynes Central. 37 min £36.