The Offaly champions ran five point winners over St Mullin's of Carlow.
Kilcormac-Killoughey are back in a Leinster semi-final after they emerged from their meeting with the Carlow champions in Dr Cullen Park on Sunday.
KK were in control during the first half, leading St Mullins by 1-8 to 0-2 after 20 minutes.
The home side came back into the contest and registered the score of the game early in the second half thanks to a screamer of a goal from James Doyle.
Shane Hand's side saw the game out for a 1-17 to 1-12 win at full time.
Hand says there's no guarantees at senior provincial level:
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