Best local business to rent from for your South Island road trip. The facilities are just outside…read morethe ChCh airport, but they conveniently offer a hassle-free, complimentary shuttle pickup from the Air NZ check-in area. It picked up PROMPTLY upon clicking the 'Ready to Collect' link on an email they sent around the approximated arrival time listed in my booking.
The SUV we rented, a Nissan X-trail (basically a Rogue w/ 4x4 capabilities), was not brand new, but it was in perfect working condition, the rates 30-40% cheaper than Enterprise at the airport. And that included an additional driver, unlimited mileage, and $0 excess insurance, booked 2 months in advance. The service guys were a bit curmudgeonly, but perked up some after giving them my undivided attention. Note: Your United States driver's license will do in NZ; no need to acquire an IDL.
Drop-off was a breeze. The shuttle driver kindly looked up the beginning and end mileage when requested at the time of drop off and before driving us back to the airport for our departure flight. 1500 road miles+ around the South Island to make for such a gratifying journey!