According to Official Guinness Records,
The farthest distance to throw a bullseye in darts is 6 m (19 ft 8.2 in) and was achieved by Matthew Prouse (UK) in Reading, UK, on 30 April 2017.This attempt took place to raise funds and awareness for child and adolescence mental health issues.
For a complete list of 2017 records, please visit 2017 Guinness Records in United Kingdom.