This relatively indirect route runs along what is in essence a branch line connected to the Cork–Dublin mainline at Mallow. Trains run to/from the south of Tralee. As of 2017 there were eight trains from Mallow to Tralee and nine trains the other way around. All services are operated by 22000 Class railcars, with the exception of the very early morning service from Tralee to Cork and some Sunday services (From Tralee to Cork via Mallow) which are operated by a 2-carriage 2600 Class Commuter set. There is one service a day from Dublin Heuston to Tralee in each direction Monday to Friday. On Sunday there is two trains from Heuston to Tralee and three from Tralee to Heuston. Journey times range from 3 hours 40 minutes to 3 hours 53 minutes. On this line, Farranfore railway station provides a direct connection with Kerry Airport.