So it seems like the curfew is the biggest barrier to making a double daily work, which makes sense.

Im surprised there isn’t more capacity on NA-AUS routes generally though. If someone has the data on this I’d love to be corrected, but it seems capacity adds from AC, UA, QF, AA and DL are getting absorbed without much in the way of price reductions on those routes. It’s only in the last 6 months that I’ve seen sub C$1,300 pricing in Y on my regular YYC-SYD flight. Whereas HKG, SIN, TPE etc are usually sub C$800 for the same distance, and in some cases worse aircraft utilization with an overnight stop.

also, I can confirm from anecdotal evidence that LAS is extremely popular for Australians, at least with all my old high school friends here.