Fiji Airways has round-trip flights from Dallas (DFW) to Christchurch (CHC) for $794-$803 with a connection. Flights March to September. Departures on Tuesday, Thursday, and Saturday. Extended weekends available. Origin/Destination reversible.
Some small OTAs on Skyscanner have this for as low as $713; which is cheaper than the airline.
Read More Cheap Flights: Dallas to/from Christchurch $713-$803 r/t [March-September] – Fiji Airways