On 12 July 2020, Cádiz were the first team to be promoted to La Liga, ending a 14-year run in the lower divisions, seven of which were spent in Segunda División B, following Oviedo's 1−0 win against Zaragoza. The second team to earn promotion was Huesca after their 3−0 win against Numancia on 17 July 2020. This marks an immediate return to the first division. The final team to achieve promotion were play-off winners Elche after defeating Girona 1−0 on aggregate, they return to La Liga after a five-year absence, with one of those seasons spent in Segunda División B.
