Ilagan won the 2015 Soft Tip Dartslive Asia Open by beating Hyun Chul Park in the final. He partnered Gilbert Ulang at the World Cup of Darts and they lost 5–1 to Belgium in the opening round. A victory over Daisuke Akamatsu saw Ilagan claim the Malaysian Open. He came within a match of playing in the 2016 World Championship, but lost 3–2 to Alex Tagarao in the final of the Philippines Qualifier.