Los Rojillos scored one goal in the first half and two in the second with Álvaro Cejudo, Kike Sola and Manuel Omwu all on target.
Cejudo plied his trade for 65 minutes during the match. He scored in the 22nd minute and assisted for Kike Sola's goal in the 63rd minute.
At 19th in the table, the Periquitos are currently fighting for survival and remain one point adrift of safety with a mark of two wins, six losses and three draws.
After 11 games Osasuna are currently in the relegation zone, two points behind 16th-place Granada CF with a record of two wins, seven losses and two draws.