Carlisle will face Southampton in the final of the Johnstone's Paint Trophy after they both progressed to Wembley on Tuesday night.
The Cumbrians, who were 1-0 up after the first leg of their northern section final, held their nerve to win a dramatic penalty shoot-out 6-5 after losing 3-2 on the night against Leeds.
Carlisle twice led through Adam Clayton and Kevan Hurst but Leeds staged a fighting comeback in normal time to level the aggregate scores with goals from Robert Snodgrass, Jason Crowe and Mike Grella before penalties settled matters.
Southampton beat MK Dons 3-1 to claim a 4-1 victory on aggregate.
Rickie Lambert opened the scoring and Saints' lead was doubled on the half hour after a comical own goal from Dons defender Danny Woodards - an attempted clearance hitting him in the chest and dribbling past goalkeeper Willy Gueret.
Paul Ince's side pulled one back on the stroke of half-time through midfielder Mark Randall's neat 12-yard finish, but the home side remained on top.
The impressive Adam Lallana eventually made the game secure and confirmed Southampton's first Wembley final since 1992 with a powerful finish in the 87th minute.
