From Luton train to London St Pancras International, walk to King's Cross St. Pancras Underground Station, Tube to London Liverpool Street, then train to Braintree. 2 h 26 min £34. From Luton Station Interchange (Luton Railway Station) bus to Stansted Airport, Coach Station (Stansted Aprt) then line 133 bus to Braintree Town Centre, Bus Park (Braint Bus Pk). 2 h 41 min £18. From Luton drive to Braintree. 1 h 7 min £10.