On Friday night, Southampton advanced to the Championship play-off final with a 3-1 win over West Brom.
Last week at the Hawthorns, the first leg finished in a scoreless draw.
Will Smallbone put the Saints on the board four minutes after the half as they sought an immediate return to the Premier League.
In the eighth minute, Adam Armstrong scored twice for Southampton to seal the deal.
Cedric Kipre was able to head in a late consolation, nevertheless, because there was ample time.
As a result, the final will take place between Southampton and Leeds, two clubs vying for the final promotion position, behind Leicester City and Ipswich Town.