The game between the Premier County and Kilkenny will throw in at 5 o'clock on Saturday week in Croke Park.
The additional service will leave Birdhill at 11:50am and stop at Nenagh at 12:16pm – it will then stop at Roscrea at 1 o'clock before travelling direct to Heuston station arriving at 2:30pm.
The return service will leave Dublin at 8:40pm and there will be no change at Ballybrophy.
Tickets can be bought on line at www.irishrail.ie