In general when looking for the cheapest flight to Nadi, try to book your flight during the month of May for the best deal.
From most locations, booking your flights to Nadi around 44 days prior to your departure date finds the best deals.
From most locations, the cheapest day to fly to Nadi is Monday. Most users found that departing on a Thursday was most expensive.
On average you can find the best deals on plane tickets to Nadi when looking for flights with evening departure times.