SEATTLE (AP) -- Boeing has finalized an order with Turkish Airlines for 20 new 737s.

The order announced Monday is valued at $1.6 billion at current list prices. It was previously posted on Boeing's Web site to an unidentified customer.

Turkish Airlines operates a fleet of 66 Boeing planes.Airplane maker has finalized an order with Turkish Airlines for 20 new 737s valued at $1.6 billion at current list prices.