Hi after reading the article about using Qantas points to fly on Japan Airlines I was wondering what other airlines you can use your Qantas points to fly?

I am looking at flying to Hawaii sometime next year and looking for a business class fare using points. when would be the best time to go?

Likely hood of a business class seat using points on Qantas.

Flying QF 

I am flying from the Gold Coast to Melbourne in Business class, then mel to adl in economy, can i still use the lounge in Melbourne?