Offaly were beaten by nine points at Parnell Park last night.
Dublin were too good for Offaly in their Leinster Minor Football semi-final last night.
The boys in blue lead throughout at Parnell Park to win out 2-13 to 2-4, and head for a final meeting against Kildare.
Niall Furlong and Luke Kelly got the goals for the Faithful County.
Meanwhile, Laois and Westmeath have progressed to the semi-finals of the Seamus Heaney Minor competition.
Laois beat Carlow 4-6 to 1-12 at Netwatch Cullen Park, while Westmeath beat Longford 4-13 to 2-14 at Glennon Brothers Pearse Park.
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