Originally Posted by
LTN Phobia
I may have this wrong but if I remember correctly, if the extra baggage allowance is bestowed upon you through home airline status rather than the cabin, you will not get an extra allowance on OW airlines other than your home airline, because extra baggage allowances are not OW benefits (unlike on Star Alliance).
British Airways Gold and Silver Executive Club members, American Airlines Executive Platinum and Platinum members and Iberia Plus Platinum and Plus Gold members can check in 2 bags in all cabins, on all routes, unless the cabin allowance is greater.
British Airways Gold and Silver Executive Club members, American Airlines Executive Platinum and Iberia Plus Platinum members will be exempt from the heavy bag charge for bags weighing between 23kg and 32kg.
This applies to all passengers travelling on the same booking.
(ba.com)