Cutbacks come after President Donald Trump's controversial travel bans target Middle East.
It comes three years after MH370, bound for Beijing, disappeared with 239 people on board.
The deal will allow the US carrier to tap into China's growing aviation market.
Can long-haul air travel also be low cost?
Can we reduce air traffic congestion?
Aviation trends to watch out for in 2017
What expansion plans do other UK airports have?
What's been the cost of years of delay?
A key role in Britain's aerospace industry
Fasten your seatbelts for a short flight across the history of Britain's love affair with air travel.