Go through your results for flights to Ballina in Australia with Netflights. Although Emirates usually has the best prices, it's best to double check what's available for your travel dates.
If these flights are too expensive, try searching for a different time of year. So if your dates are flexible, consider looking at different times of year.
So, if the flights to Ballina don't work for you, you could always try searching for flights to other airports in Australia.
For even more options, check what other airports you could fly to Ballina from. You might be able to make a saving by going from a different airport or city.