It started on 6 October 2018 with the first round of the regular season and ended on 25 May 2019 with the promotion playoffs.
On 2 June 2018, the General Assembly of the Spanish Basketball Federation agreed some changes in the competition format:[1] A total of 24 teams contested the league, including 10 sides from the 2017–18 season, two relegated from the 2017–18 LEB Oro, four promoted from the 2017–18 Liga EBA and eight guest teams according to the FEB criteria.
[2] On July 11, 2018, Isover Basket Azuqueca, CB Vic Universitat de Vic, Bàsquet Girona, Aquimisa Laboratorios Queso Zamorano, Igualitorio Cantabria Estela, Quesería La Antigua CB Tormes, TeslaCard Círculo Gijón and Zornotza Saskibaloi Taldea achieved the vacancies from the expansion to 24 teams.
In order to preserve chronological evolvements, any postponed matches are not included in the round at which they were originally scheduled, but added to the full round they were played immediately afterwards.
Source: FEB The Copa LEB Plata was played on 22 December 2018, by the first qualified team of each group after the end of the first half of the season (round 11 of first phase).