A 2-1 win in the driving Boras rain (5-1 agg) secured safe passage for Valencia as four new recruits received their competitive debuts.
Ivan Helguera took just five minutes to open his Valencia goal account, all but ending any chance of an unlikely Elfsborg revival.
Flores also handed a starting jersey to Timo Hildebrand in goal.
Marco Caneira kept his place from the first leg at right back, while Sunny and Jaime Gavilan were given starts in central and left midfield respectively. The game was an open and physical affair, threatening to flair up on occasion, though the early Helguera goal knocked the wind out the Swedish sales.
The hosts fought back with a Daniel Alexandersson goal just after the half hour mark, but Los Che never looked in danger of relinquishing their sizeable aggregate lead. Both Javier Arizmendi and Alexis played their first competitive minutes in Valencia colours, coming off the bench in the second half.
Elfsborg caused the visitors some problems in the the last half hour, parly due to defensive confusion and some poor marking by Valencia's backline, and Hildebrand was called upon a couple of times to intervene. But substitute David Villa, on for David Silva mid way through the second period, secured the win in the dying minutes. Villa put Morientes's replacement Arizmendi through on goal, and after the ex-Depor forward saw his shot parried, the much-wanted hotshot was on hand to knock home the winner.
Goal.com - Champions League - CL Report: Victory Sees Valencia Comfortably Through