At list prices, the deal is worth $4.9 billion, although carriers typically get volume discounts.
Boeing has confirmed the preliminary deal, but has not posted it officially on its website as a firm order as of yet.
“We continue to see very strong growth within the region and these new aircraft will position SilkAir well,” the unit’s Chief Executive Officer Marvin Tan said in a statement. The carrier undertook “detailed evaluations and extensive negotiations with both Airbus and Boeing” before placing the order, he said.
Silk, which is the regional arm of Singapore Airlines, will more than double the size of its fleet with this order by 2021 to serve the exploding Asian commercial aviation market.