Play-offs, final stage

Second leg matches

Four teams qualified for the final stage, where they will play-off over two legs for the two remaining promotion spots. As chance would have it, two teams from each of the regional groups III & IV made it through, but with rankings in the regular season taking preference over the rule keeping sides from the same group apart, Extremadura will play Cartagena, and Elche will meet Villarreal B. (10.06.18)

First leg results were as follows:

Finals, first leg
16 Jun Elche
Iván Sánchez, Nino
2-0 Villarreal B
17 Jun Extremadura
1-0 Cartagena