The Blaugrana beat Los Che 3-0 on aggregate, sealing their place in April's showpiece on Thursday with a 2-0 win at the Mestalla Stadium.
Barca have dominated the Copa del Rey in recent years, per ESPN FC's Samuel Marsden:
Sevilla reached the final on Wednesday. Having drawn 1-1 at Leganes in the first leg, they won 2-0 at the Ramon Sanchez Pizjuan in the second leg to complete a 3-1 aggregate scoreline.
Luis Suarez produced a superb performance for Barca as he set up both goals in Thursday's win.
A fantastic dribble and cross from the Uruguay international on the left set up Philippe Coutinho for his first Barcelona goal with a volleyed finish at the far post, just four minutes after coming on at half-time for Andre Gomes.
After a stunning save from Jasper Cillessen to deny Valencia a lifeline through Jose Gaya, Suarez won possession from a defender and teed up Ivan Rakitic to round out the scoring in the 82nd minute.
Rafael Hernandez of Grup14 lauded manager Ernesto Valverde:
Rafael Hernández @RafaelH117
Valverde recovered Barcelona’s team spirit, introduced sharp and simple tactics in the spirit of Johan Cruyff’s best, has eased the club into walking pace to two trophies after the worst summer in the club’s history, recovering Suárez and Rakitic from damning slumps in form.
The Spaniard's management of the club has been nothing short of superb, and with Barca leading La Liga by nine points, they remain in the hunt for a double or perhaps more.
Joaquin Correa and Franco Vazquez sealed the win for Sevilla on Wednesday. The former dispatched the ball into an empty net from close range after quarter of an hour, while the latter lashed home with a minute of normal time remaining.
The result sparked joyous celebrations among the Los Nervionenses players:
It also continues their impressive run of appearing in finals, per football journalist David Cartlidge:
The final will be a rematch of the 2016 event, which Barcelona won 2-0 after extra time.
The Blaugrana will naturally be favourites for this contest, too, but Sevilla have the capacity to overcome them over 90 minutes if they can get their approach and performance right on the day.