He added: "I think the Prime Minister has the right to choose whoever he wants, but he has deliberately not chosen me or [Green MP] Kevin Hague, who played a key role in the anti-apartheid movement of 1981."
The New Zealand delegation includes Prime Minister John Key, Labour leader David Cunliffe, Maori Affairs Minister Pita Sharples, former prime minister Jim Bolger, and former foreign affairs minister Sir Don McKinnon.
Dr Sharples said yesterday that he would represent protesters at the official memorial service for Mandela, but Mr Harawira did not believe Dr Sharples was the right person for the job.
"I never saw Pita in the meetings, certainly never saw him on the street," Mr Harawira said.
The Mana leader has booked a flight to South Africa this afternoon, but has not yet been given approval to use his parliamentary funding to make the trip.
If he was not given approval, he would delay his trip until he could raise money for the flight: "I don't have the money myself."