Shelbourne came from 2-0 down at the break on Friday night to book a return to European football.
Aided by a Luke Heeney red card, Damien Duff’s side were 4-2 winners away to Drogheda.
That means Bohemians need to win the FAI Cup to claim a European place - they signed off on the league season with a 4-0 defeat of Cork City.
Pat Hoban scored what will likely be his final goals for Dundalk in a 5-1 victory at UCD.
Champions Shamrock Rovers finished the season with a 4-2 defeat of Sligo Rovers.
Your 4 in a row Champions! #4IAR #ShamrockRovers pic.twitter.com/NBDmCopVf1
— Shamrock Rovers FC (@ShamrockRovers) November 3, 2023
While Cup finalists St Pat’s lost 3-0 away to Derry City.
Cork City’s opponents in the promotion-relegation playoff will be revealed on Saturday evening.
Their own Turner’s Cross ground is the venue for the playoff final clash between Waterford and Cobh Ramblers.
Kick-off is at 5pm on Saturday.
