Aspinall was beaten 6–5 by Stuart Kellett in the second round of the 2016 UK Open. At the sixth Players Championship he reached his first quarter-final on the main tour and narrowly lost 6–5 against Vincent van der Voort. Aspinall qualified for his first Grand Slam of Darts, but could not get a win out of his group fixtures with Raymond van Barneveld, Mensur Suljović and Danny Noppert to finish bottom of his group.