National Express operate direct services between Froxfield and Trowbridge Froxfield to Trowbridge is a distance of 28 miles (45 kilometres). National Express operate 1 direct buses per day. The fastest journey each day takes 1hrs 5mins. See our route guide and coach timetables below for more details. Doing a search on Coachfairer is the best way to find the fastest journeys by all operators and the cheapest prices!