ZK-NBT wrote:A 737 operating costs are a lot lower than a 777.
It's just not going to happen - as long as WLG needs to be a one-stop service, that service will go through one of the main ports, like BNE, MEL or SYD, as opposed to ADL, CBR or CNS, because fifth-freedom traffic between Australia and New Zealand will be needed to top up the service (SIN - WLG traffic isn't enough). Even with a 737 flying on SIN - CBR - WLG, and with SIN - WLG traffic, there would not be enough CBR - WLG traffic to sustain the increased frequency of a narrow-body tag to WLG that you're talking about. As it's highly unlikely that SQ would ever deploy a narrow-body to BNE, MEL or SYD, WLG is highly likely to continue to receive a wide-body from SQ in the future.
Aside from this, there are other reasons too, such as i) VA deliberately not launching MEL - WLG, while launching SYD - WLG, potentially allowing for a Tasman VA - SQ tie-up on MEL - WLG, ii) SQ having a premium brand position in the long-haul market, which deploying a narrow-body to a destination more than 5,000 mi away from SIN would be inconsistent with, and iii) a wide-body being able to lift bigger individual cargo items than a narrow-body ever could, giving SQ, at least on the cargo front, a mitigating factor for the stop ex-WLG in Australia. IMO, you're more likely to see SQ's 737's be deployed regionally to non-stop destinations ex-SIN, of which there are many options before WLG: