National Express operates a bus from Stevenage to Braintree every 3 hours. Tickets cost $8 - $13 and the journey takes 50 min. Arriva UK also services this route every 15 minutes. Alternatively, Great Northern operates a train from Stevenage to Braintree every 30 minutes. Tickets cost $14 - $21 and the journey takes 25 min. 2 other operators also service this route.
From Stevenage, Bus Station bus to Stansted Airport, Coach Station (Stansted Aprt) then line 133 bus to Braintree Town Centre, Bus Park (Braint Bus Pk). 1 h 51 min £14. From Stevenage train to King's Cross St. Pancras Underground Station, Tube to London Liverpool Street, then train to Braintree. 2 h 22 min £33. From Stevenage taxi to Braintree. 50 min £170. From Stevenage drive to Braintree. 50 min £7.