Always worth checking luggage and baggage allowances before you travel
Baggage allowances can be complicated, varying according to routes and class of seat and taking into account the number, weight and dimensions of bags, free allowances, and ever-changing aviation rules. In general, excess baggage and special items can be carried for an additional fee.
For all airlines flying into and out of the UK, a recent safety requirement has been introduced restricting the weight of each single item of luggage to 32kg. This is not your full baggage allowance, rather a measure to reduce strains and injuries among baggage handling staff.
Baggage allowance for American Airlines
Luggage max size: 158 cm / 62" (height + length + width)
Luggage max weight: 23kg
Max hand luggage bags per person: 1+ 1 smaller bag
Hand luggage max size: 56 x 36 x 23cm / 22 x 14 x 9in
Hand luggage max weight: Unrestricted
More information: American Airlines passengers are permitted one carry-on bag and two pieces of hold baggage, maximum 23kg or 32kg depending on route, all free of charge.
Remember, this information is liable to change so always check on your airline and airport websites before you start packing.