Turkish Airlines, the national carrier based in Istanbul has announced a new aircraft order for 20 Boeing 737 aircraft direct from the manufactures.

The new aircraft order will be split equally between two different variants, Turkish Airlines will receive 10 Boeing 737-800s and 10 Boeing 737-900ER's, where the ER designation stands for Extended Range. The order is worth $1.6 billion at current list prices. The Turkish Airlines fleet currently contains 66 Boeing aircraft including 58 Next-Generation 737s with the new 20 aircraft to be delivered between 2011 and 2014.