Hi Willy
The flight I booked is with Air New Zealand direct, on the same dates Qantas was £427 + cc direct, and under £400 with Qatar via Doha.
Flight costs change daily and these flights could be £500 now, but last summer i flew with Qatar for £424
Your Cathay ticket is high, in april I flew with them direct to HK and then on to Cebu in the philippines for £595.
Cathay is a top airline, the foods really good, they only problem is they dont load the planes by seat rows, it a free for all.
On my 6 visits to asia i have not used the same airline twice, cost is always a factor and costs always change
JimB theres nothing wrong with a back up plan