In 2016, Mireia competed in 11 LET tournaments and secured her best performance of the season at the Lalla Meryem Cup finishing in T36 position. Mireia earned her card for the 2017 season after finishing T72 at the Lalla Aicha Tour School Final Qualifying in Morocco.
In 2015, Mireia played in 10 LET tournaments and secured her best finish of the season at the Lalla Meryem Cup, where she came T44. She finished the season in 110th position in the Order of Merit, winning €5,331.62.
In 2014, Mireia played in 20 LET tournaments and secured her best finish of the season at the Sberbank Golf Masters (T14).
In 2013, Mireia played in 6 tournaments on the LET and made 5 cuts, with her best result T16th at the Allianz Ladies Slovak Open presented by Respect. She concentrated on playing on the LET feeder tour, the Access Series, also known as LETAS, which paid off as she won the Order of Merit securing her LET card for the 2014 season. She secured two victories and nine further top ten finishes from 15 tournaments played over the season. She won the Ocho Golf Ladies Open in Galicia and won again on home turf at the Costa Blanca Ladies Open in Spain.
In 2012, her first season on the LET, Mireia played 11 tournaments, 4 cuts made, best finish T28 at the South African Women’s Open. Ended 139th on the Order of Merit with season’s earnings €4,934.50. Returned to Lalla Aicha Tour School and ended T49th, earning LET membership in category 9B.