National Express operate direct services between Ponterwyd and Llanidloes Ponterwyd to Llanidloes is a distance of 13 miles (21 kilometres). National Express operate 1 direct buses per day. The fastest journey each day takes 0hrs 30mins. 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!