Originally Posted by
magnitude
My sister, her son and I will be flying on the same plane from LAX to SYD (A380). I'll be in 1st, and they'll be in economy. Since this is a very long flight (16 hours), I was thinking I'd give my sister a break for a few hours and I'd sit with my nephew, while she takes my seat in 1st. How possible is that on Qantas?
you will need to discuss this with the cabin crew. I know some people have had success in swapping seats, but it is at crew discretion. They may say no.
They may also put other limitations on the swap - for example, one time swap only. So you may take the seat in economy and not get the chance to move back.
No harm in asking the crew on the day how they can accommodate your wises, but there is no guarantee, and no 'right' (in the terms and conditions or anything) to swap once the plane leaves the gate.