In a chat with Sports news, Anthony Hamilton said that his son could win the F1 crown far earlier than in the 2014 season.
"You never know, but I think if you look at what Lewis went through last year, we started the year where we felt that if everything had gone well, by mid-year he probably would have won the championship,” he told Sports.
"I think the same thing could potentially happen this year- if he starts well, if the car is good, performance is good, I think Lewis could win the championship again this year," he added.
Hamilton will start his defence on March 3 at the Australian Grand Prix.
The 2015 F1 calendar in full:
29/11 Abu Dhabi