oneworld links American Airlines, British Airways, Qantas, Cathay Pacific, Japan Airlines and their partners, and its Sapphire and Emerald tiers add checked bags across every member. The allowances themselves stay the carrier’s own: American has no cabin weight limit, British Airways allows 23 kg in the cabin, and Qantas and Cathay Pacific hold the overhead bag to 7 kg.On a ticket that connects two members, the most significant carrier rule decides whose allowance applies for the whole journey. Each carrier page below shows the figures read off that airline’s own site and the date they were checked.