Fiji Airways has round-trip flights from Dallas (DFW) to Nadi, Fiji (NAN) for $628-$678, NONSTOP. Cheapest dates are on Tuesdays.
Bookable on most OTAs, other than Google.
Read More Nonstop Flights: Dallas to Nadi, Fiji $628-$678 r/t [Jan-May] – Fiji Airways