Boeing and United Airlines announced an agreement at the 2017 Paris Air Show to convert 100 of its current 737 MAX orders into 737 MAX 10s, becoming the largest single 737 MAX 10 customer in the world.
United also announced an order for four additional 777-300ER aircraft. United expects to begin taking delivery of the 737 MAX 10 in late 2020.
The 737 MAX is the fastest-selling airplane in Boeing history.