Faithful to meet Longford in decider on Saturday.
Offaly will face Longford in the O'Byrne Cup final on Saturday next after the Faithful County beat Westmeath by 16 points to 11 at Bord na Mona O'Connor Park in Tullamore on Saturday.
A strong second half saw John Maughan's men pull away from the Lake County.
Elsewhere Galway and Roscommon will contest the Connacht FBD league final next Saturday at Dr Hyde Park
In new manager Pádraic Joyce's first game in charge the Tribesmen beat Mayo 3-2 on penalties in Castlebar after playing out a 1-17 draw.
Roscommon then stormed into the decider - beating Leitrim 7-16 to 7 points in the other last-four tie.
In Ulster, reigning champions Tyrone beat Down 2-16 to 1-10 in the semi-finals of the Dr McKenna Cup and they'll face Monaghan in the final.
In hurling's Walsh Cup semi-finals - Galway beat Dublin 19 points to 18 in Parnell Park in new manager Shane O'Neill's first game in charge of the Westerners.
Henshaw Still Supporting Buccaneers
Aoife O'Rourke Wins Another European Medal
Westmeath U20s Clinch Final Spot
Offaly Rider Dominates Mondello Masters Opening Rounds
Westmeath Under 20s Face Tough Test To Progress To Final
Westmeath Struggles Are A Credit To Kerry - Tommy Doyle
Nicole Turner Taking On Best Of Europe In Madeira
O'Rourke Sisters Fighting For More Major Medals Today
Words Fail Me - Offaly Manager Left Shocked At Loss To Laois
Westmeath Fight Back To Secure Championship Opening Draw Against Offaly
I Want The Blame To Fall On Me - Joe Fortune
Goal Of The Season Contender Secures Athlone First Away Win
Laois Enjoy Sun Kissed Comeback Victory Over Offaly
Westmeath Will Enjoy "Competition Of Equals"
Laois Ready To Leave League Campaign Behind
Town Looking To Secure Progress In All-Island Cup
Joe McDonagh Cup: Laois v Offaly - Commentator's Preview
Westmeath And Offaly Minor Hurlers Looking To Continue Winning Ways
Offaly And Westmeath Gearing Up For Midlands Clash
Offaly GAA Community Mourning The Loss Of Former County Chair