Following a forgettable goalless stalemate in the first leg at Carrow Road last weekend, Elland Road staged one of the most one-sided Championship playoff contests on Thursday that was dominated from start to finish by Daniel Farke's men.
The hosts had won only two of their previous nine matches prior to the second leg, but they had their swagger back against the Canaries and were deservedly three goals ahead at half time, with Ilia Gruev's clever free kick in the seventh minute followed by Joel Piroe's smart header and Georginio Rutter's fierce finish.
Championship Player of the Season Crycensio Summerville completed the rout when he tapped home a fourth midway through the second half on a night to forget for Norwich, particularly goalkeeper Angus Gunn who was arguably at fault for three of the four goals buried by a ruthless Whites outfit.
Leeds have advanced to their fourth EFL playoff final and first since the League One showpiece in 2007-08. The Whites have never gained promotion via the playoffs, but they will get the chance to walk out at Wembley and end that run when they face either Southampton or West Bromwich Albion in the final on May 26.
As for Norwich, they 100% record of progressing from playoff semi-finals has come to an end and David Wagner's side must prepare themselves for a third straight season in the second tier.
Leeds' dream start is Norwich's nightmare
In front of a raucous Elland Road crowd, Leeds flew out of the traps and made an electric start to the contest. Few would have been surprised to see the hosts take an early lead, but many would not have expected deep-lying midfielder Gruev to be the man delivering the goods in front of goal.
Leeds were awarded a free kick from around 25 yards out and it looked as if Summerville would curls in a cross, but he stepped over the ball and allowed Gruev to strike. Summerville's movement separated Norwich's pointless two-man wall that soon became non-existent, allowing Gruev - who was aware that goalkeeper Gunn was not quite ready and positioned too far over to his right - to whip his free kick into the bottom corner.
Elland Road erupted as the ball nestled into the net and the Bulgarian goalscorer wheeled away to celebrate his first goal for the Whites on his 33rd appearance for the club since joining last summer.
Norwich offered little in response to Leeds' opener, but just as they appeared to gain a foothold and settle into the contest, the hosts doubled their lead on the 20-minute mark, capitalising on Gunn's indecisiveness between the sticks.
The Canaries goalkeeper was again exposed by a wonderful delivery, this time from Wilfried Gnonto who picked the ball up from a deep position on the right and whipped his cross towards the far post. Gunn was caught in two minds over whether to attack the ball or stay on his line; instead, he did neither and that allowed Piroe to time his run perfectly and nod the ball home from close range.
The one mistake of note that Leeds made in the entire first half was a collector's item for Ethan Ampadu, who slipped in possession and allowed Joshua Sargent to race through on goal in the 23rd minute. The Norwich striker tried to be cute and dink the ball over Illan Meslier, but the Leeds goalkeeper rushed off his line and made himself big to produce a superb save to deny the American.
That missed chance - Norwich's only shot on target throughout the 90 minutes - proved costly, as their ruthless counterparts scored a third five minutes before the break to plant one foot firmly in the final. Piroe charged forward down the left before Summerville nudged the ball across the box towards Rutter, who smashed an emphatic side-footed shot in off the crossbar.
Norwich blown away by ruthless Leeds
It was a long way back for Norwich - who were forced to take off Sargent at the interval due to injury - and although Gunn endured a shaky first half, the Canaries could have been further behind had it not been for the Scotsman's early second-half showing.
Less than a minute after the restart, Gunn made a brilliant stop to deny Piroe's powerful strike from around 10 yards out, before stretching his limbs to keep out the Dutchman for a second time from close range.
However, Gunn could arguably have done better with Leeds' fourth goal scored in the 67th minute. He could only parry Gnonto's shot straight into the path of Junior Firpo on the left, and he rolled a simple pass into a central position for Summerville to slot home his 20th league goal of the season.
Norwich offered little going forward in the closing stages; throughout the game they were sliced open every time Leeds came charging forward and they were ultimately blown away by the superior side in emphatic fashion.
Leeds now have just over a week to prepare for their trip to Wembley where they will face the winner of Friday's second semi-final between Southampton and West Brom, who played out a 0-0 draw in the first leg.