I'm thinking of flying from the US (Los Angeles) to PNG via Sydney. I cannot buy a ticket on QANTAS for this trip on their website, despite the fact that QANTAS has a code-share with Air Niugini for the SYD to POM leg. However, I can buy two tickets, QANTAS for LAX to SYD and Air Niugini for SYD to POM, with a 3 hour layover in Sydney. I understand the transfer procedure for myself, I think, as both flights use Terminal 1. But what about my checked luggage? Will QANTAS check it through to POM? Will I have to get it in Sydney and recheck it? How? Any help I can get will be appreciated. I don't want a repeat of last November, when I flew from MEL to Noumea via Sydney, both flights on QANTAS, and they lost my luggage for two days.