Due to multiple factors, expect to potentially pay more when booking in December. For low rates, September can be a great choice for travel to Fiji. Flights to Fiji from Dallas Love Field Airport in September are about $1,156 on average during September, but can be found for as low as $569.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Dallas Love Field Airport to Fiji as you normally would.