Chisnall defeated Ricardo Pietreczko 8-6 in the final to join Michael van Gerwen and Peter Wright as the third player to win eight European Tour titles.
Competing in his 100th European Tour event, Chisnall overcame Wright and Chris Dobey in the quarter-finals and semi-finals respectively earlier in the evening at the Antwerp Xpo.
2024 Flanders Darts Trophy
Sunday September 8
Afternoon Session (1300 local time, 1200 BST)
Third Round
Chris Dobey 6-5 Josh Rock
Luke Woodhouse 6-5 Gian van Veen
Peter Wright 6-5 Stephen Bunting
Dave Chisnall 6-2 Gabriel Clemens
Ricardo Pietreczko 6-1 Danny Noppert
Dirk van Duijvenbode 6-2 Luke Littler
Ryan Searle 6-3 Ross Smith
Luke Humphries 6-5 Ryan Joyce
Evening Session (1900 local time, 1800 BST)
Quarter-Finals
Chris Dobey 6-3 Luke Woodhouse
Peter Wright 5-6 Dave Chisnall
Ricardo Pietreczko 6-4 Dirk van Duijvenbode
Ryan Searle 2-6 Luke Humphries
Semi-Finals
Chris Dobey 5-7 Dave Chisnall
Ricardo Pietreczko 7-4 Luke Humphries
Final
Dave Chisnall 8-6 Ricardo Pietreczko