Leading 1-0 from the first leg in Madrid on Wednesday, Valladolid were pegged back just before half-time when Fernando Sales headed the visitors level on aggregate.
However, Javi Guerra, who had scored the winner at Santo Domingo earlier in the week, was on target again six minutes after the break to ensure a return to the top flight after a two-year absence.
Miroslav Dukic's men had missed out on automatic promotion by just three points as they finished third behind Celta Vigo and champions Deportivo La Coruna, a full nine points ahead of Alcorcon in fourth.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!