The average train between Killarney and Dún Laoghaire takes 4h 21m and the fastest train takes 3h 56m. The train service runs several times per day from Killarney to Dún Laoghaire. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 4 hours between Killarney and Dún Laoghaire. The earliest departure is at 5:05 AM in the morning, and the last departure from Killarney is at 7:41 PM which arrives into Dún Laoghaire at 11:57 PM. All services require a transfer at Mallow and take an average of 4h 21m. The schedules shown below are for the next available departures.



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3h 56m • 3 changes



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3h 58m • 3 changes



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Want to know about travelling from Killarney to Dún Laoghaire? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Killarney to Dún Laoghaire. However, there are services departing from Killarney station and arriving at Dún Laoghaire station via Mallow. The journey, including transfers, takes approximately 4h 21m.
Killarney to Dún Laoghaire train services, operated by Iarnród Éireann (Irish Rail), depart from Killarney station.
Killarney to Dún Laoghaire train services, operated by Iarnród Éireann (Irish Rail), arrive at Dublin Heuston station.
The distance between Killarney and Dún Laoghaire is 265.4 km. The road distance is 310 km.
You can take a train from Killarney to Dun Laoghaire via Mallow, Dublin Heuston, Heuston, Abbey St., and Tara Street in around 4h 20m.