An order for 400 single-aisle jets would be worth more than $40 billion at list prices, as discounts are common on large orders.
Dubai Aerospace Enterprise (DAE) is in talks to buy 400 aircraft from Airbus and Boeing.
Firoz Tarapore, CEO of the company, which is government-controlled, is prepared to expand its fleet through acquisition if talks fall.
The company is said to be interested in buying single-aisle Airbus A320neo-family and Boeing 737 MAX planes after its purchase last year of Dublin which was based lessor AWAS.
Any deal further would not be evenly split between the two plane makers.
Tarapore was quoted by saying that any deal would not necessarily be evenly split between the two plane makers and he also added that any order was still to be finalized.
An order for 400 single-aisle jets would be worth more than $40 billion at list prices, as discounts are common on large orders.