A five point Monaghan win over Down sets up a meeting with Cavan in the provincial decider.
Monaghan started strong racing into a four point lead with Chloe McBride and Casey Traynor registering scores.
A point from Aoibheann McCormack and a further Chloe McBride point sent Monaghan into a three point half-time lead.
Indeed, at the break Monaghan led, 0-7 to 0-4.
Sarah Tierney, Chloe Bride and Sarah Tierney ensured that Monaghan keep their lead intact, booking their place in the Ulster decider where they will face near neighbours Cavan.
Monaghan running out five point winners, 0-13 to 0-8.