Route notes
Why this routing works
This routing keeps the flight structure simple: Atlanta to Auckland outbound, an overland segment within New Zealand, then Queenstown back to Atlanta. Using Auckland as the long-haul arrival point and Queenstown as the departure point avoids backtracking and turns the domestic transfer into a surface segment.
At three weeks, the schedule is short enough to work as a focused round-trip while still supporting an open-jaw within one country. The overland Auckland-to-Queenstown section is the key planning feature here, since it separates the international arrival city from the international departure city and should be timed before the final long-haul homebound leg.
Ticketing is straightforward for travelers who want one long-haul entry and a different long-haul exit in New Zealand without building a more complex multi-country itinerary. In premium economy, this route sits in the mid-range for comfort on the transpacific portions while keeping the stop pattern limited to a single destination country.
With December departure timing, this itinerary is best framed as a point-to-point New Zealand round-trip anchored by two airports rather than a loop. That structure can make the ground segment more efficient, since the route progresses in one direction before returning to Atlanta.