Neil Packer, 46, of Radleigh Gardens, Rochester, was sentenced at Maidstone Crown Court for the assaults which left this victims with significant injuries.
In March 2010, Packer approached his 21-year-old victim with a kitchen knife after a dispute. He left the man with a six inch slash to his face
The victim’s 19-year-old brother witnessed the attack and attempted to assist his brother but was also stabbed by Packer.
He was left with a number of wounds to his leg which required hospital treatment.
The brothers both had to have stitches and were told that they were lucky the incident had not resulted in more serious injuries. However, both will be scarred for life as a result of the attack.
The court heard Packer had fled to Cuba following the attack but was tracked down by officers and arrested at Heathrow Airport almost two years later.
In his defence, Packer claimed that the stabbing had been an accident.
Investigating officer, Detective Constable Darryll Paulson said: "I am pleased that Packer has received a substantial sentence following a violent attack that caused significant injuries to the victims.
"Hopefully they will get some satisfaction from knowing that the person responsible will be in prison for a long time.
"Kent police will not tolerate violence of any sort and will always seek to bring offenders to justice. This significant sentence should act as a deterrent to anyone who considers carrying out an act of violence in Kent."