Fiji Airways has round-trip flights from Dallas (DFW) to Nadi, Fiji (NAN) for $690-$747, NONSTOP. Flights August to April. Departures on Tuesday, Thursday, and Saturday. Extended weekends available. Origin/Destination reversible.
Some small OTAs on Skyscanner have this cheaper than the airline.
Read More Nonstop Flights: Dallas to/from Nadi, Fiji $690-$747 r/t [August-April] – Fiji Airways