Athy of Kildare will compete in this weekends decider.
Portarlington's dream of reaching a first ever Leinster Football final were ended at the hands of Athy over the weekend.
Pat Roe's side fell to a 0-19 to 0-11 defeat in St Conleth's Park, in a game which the Laois champions trailed by 0-15 to 0-2 at the break.
Colm Murphy missed a first half penalty, while Niall Kelly impressed for the Kildare side as he finished with 0-10.
Despite a strong second half, Portarlington couldn't complete a dramatic comeback and were also reduced to 14 men after Patrick O'Sullivan's late red card.
Roe says his side left themselves to much to do in the second half:
Pat Roe spoke to Midlands 103's Gerry Rusell following the conclusion of the game:
Coverage with thanks to The Anvil Inn, Portarlington, We would like to wish all our loyal customers and friends a Happy christmas and thank you for your custom throughout the year - Join us for live music all over Christmas and great food 6 days a week!.
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