The UK Government's Health & Safety Executive Body have stipulated that ALL airlines flying into and out of the UK can no longer load bags weighing more than 32kgs onto an aircraft.  Any baggage item in excess of the maximum 32 kgs, on all routes, will be subject to re-packing or refusal of carriage and applicable excess baggage charges will be levied.

General Baggage Allowances for Major Airlines to the USA.
The allowances shown here are for international travel.  For US-domestic flights, not connecting to a transatlantic flight, additional baggage charges may apply.  Please use the links below for each airlines current policy & pricing for baggage on US-domestic flights.

Air Canada (AC)
2 x pieces 23KG max per piece

Air India (AI)
2 x pieces 32KG max per piece (from UK-USA)

American Airlines (AA)
2 x pieces 23KG max per piece (UK-USA and USA-Caribbean)
Click Here for baggage allowance information for American Airlines flights within the USA

BMI (BD)
20KG max per person – multiple pieces permitted (UK domestic and UK-Europe)
2 x pieces 32KG max per piece (UK-USA)

British Airways (BA)
1 x piece 23KG max per piece (within UK)
2 x pieces 23KG max per piece (UK-USA and Caribbean)
Excess charges – extra piece of baggage to USA up to ?75

Continental Airlines (CO)
2 x pieces 23KG max per piece
Click Here for baggage allowance information for Continental Airlines flights within the USA

Delta Airlines (DL)
2 x pieces 23KG max per piece (UK-USA and US-Caribbean)
Click Here for baggage allowance information for Delta Air Lines flights within the USA

KLM (KL)
2 x pieces 23KG max per piece (UK-USA, Canada)
Click Here for baggage allowance information for KLM flights within the USA

Northwest Airlines (NW)
2 x pieces 23KG max per piece (UK-USA)
Click Here for baggage allowance information for Northwest Airlines flights within the USA

United Airlines (UA)
2 x pieces 23KG max per piece (UK-USA)
Click Here for baggage allowance information for United Airlines flights within the USA

US Airways (US)
1 x piece 23KG max.  A second bag up to 23KG is permitted but a charge of $25 will apply (payable to airline at airport).
Click Here for baggage allowance information for US Airways flights within the USA

Virgin Atlantic (VS)
23KG max per person (all routes except USA/Caribbean/Lagos)
2 x pieces 23KG max per piece (USA/Caribbean/Lagos)