Qantas fares do allow Singapore Airlines on certains routes. If you are on one ticket, you and your bag should be checked through. They actally both use the Amadeus system so if not one ticket but in the same booking, will be able to see the others flight and have the same booking reference.

The Qantas policy for changes is the new base fare has to be equal or higher to the old fare. If your fare paid to Johannesburg is higher than the NYC fare, you will either have to pay the next level up plus the change fee. If you Jo'burg ticket was booked in T class, this will have a $225 chang...

a) If you have booked via Alaska Airlines, their system will give you a booking reference for their booking. The NZ flight will have it's own reference as part of this booking. It will not be the same as AS as they use different reservation systems. b) You would have to check the T&C's on ...

I think it's about 330 days.

Are you booked the QF codeshare or the EK numbers to BNE? If QF and MEL flight is on the same ticket, you will be entitled to the transfer in MEL. If you have booked the MEL transfer on the QF website, call QF to confirm. EK and QF use different systems and would not be able to see each other...