Alini Delgadillo gained her first experience in international championships at the South American Games 2018 in Cochabamba , where she was eliminated in the 100-meter run with 11.84 s in the first round and finished seventh over 200 meters in 24.92 s. In addition, she won the silver medal behind the one from Venezuela in the Bolivian 4 x 100 meter relay in 46.17 s and was fourth in the 4 x 400 meter relay in 3: 55.76 min. Then she came at the Ibero-American Championships in Trujillo in 12.40 s on the seventh place over 100 meters and classified in the 200-meter run after 25.23 s in sixth place. With the 4 x 100 meter relay she won the bronze medal behind the teams from Peru and Ecuador in 47.39 s. She then took part in the U23 South American Championships in Cuenca over 100 and 200 meters , but retired there with 12.29 s and 25.06 s respectively in advance, as well as at the South American Championships in Lima the following year with 12.16 s and 25.67 s. In 2020 she set a new national record in the 60-meter run of 7.64 seconds at the South American Indoor Championships in Cochabamba , which placed her in fifth place. In addition, she won the gold medal in the 4 x 400 meter relay in 4: 00.77 min.
In 2018 and 2019 Delgadillo became Bolivian champion in the 100-meter run and in 2018 also over 200 meters. In the hall, she became the indoor champion in the 60-meter run in 2020.
Personal bests
100 meters: 11.84 s (−1.2 m / s), June 6, 2018 in Cochabamba ( Bolivian record )
60 meters (hall): 7.64 s, February 1, 2020 in Cochabamba ( Bolivian record )
200 meters: 24.81 s (+0.4 m / s), April 15, 2018 in Tarija