National is ahead in the polls, but Mr Key is leaving nothing to chance -- chartering a Beech 1900 19-seater aircraft to fly him to Napier, Taupo, Christchurch and Nelson today and Wellington, Palmerston North, New Plymouth and Auckland tomorrow.
Mr Key said he believed it was important to hit as many places as possible in the last two days.
"It's just an opportunity to do a final sweep through New Zealand to get out as much of the party vote as possible and demonstrate we're taking nothing for granted," he told reporters.
Mr Key arrived in Napier at 7.30 this morning for a street-corner breakfast barbecue that saw him spend about 45 minutes chatting and shaking hands with locals.
In Taupo, he will do a walkabout of the central area and will do the same at Cathedral Square and Northlands Mall in Christchurch.
Mr Key will visit the Sealords factory in Nelson before overnighting in Wellington where he will begin his campaigning tomorrow.
All campaigning is banned from midnight tomorrow, along with any media coverage.
Labour leader Helen Clark is spending the final campaign sprint in Auckland, where a high turnout in the city's southern seats was credited with swinging the election Labour's way in 2005.