Netherlands’ flag carrier airline KLM Royal Dutch has ordered two additional Boeing 777-300ER aircraft for $751m.

The new order for the extended range airplanes is part of the airline’s commitment to expanding its current fleet.

With the latest order, KLM’s 777 fleet will increase to more than 30 aircraft.

The Boeing Company Commercial sales and marketing senior vice-president Ihssane Mounir said: “KLM is one of the world’s leading network carriers and an aviation pioneer and we are delighted the airline has once again selected the Boeing 777-300ER to strengthen its long-haul fleet for the future.

“KLM’s continuing interest in the 777-300ERs shows the enduring appeal and value of the 777, thanks to its outstanding operating economics, superior performance and popularity among passengers.”

The 777-300ER jet can accommodate up to 396 passengers in a two-class configuration and has a maximum range of 7,370 nautical miles.

The twin-aisle airplane has a schedule reliability of 99.5%.

With operations in Amsterdam, the KLM Group has a global network across 92 European cities and 70 intercontinental destinations. The company operates a fleet comprising 209 aircraft.

The Dutch carrier operates 29 Boeing 777 jets, which include 14 777-300ERs. The airline’s fleet also comprises 747s and the 787 Dreamliner family.

In November 2015, KLM Royal Dutch Airlines received its first 787-9 Dreamliner from Boeing. In 2004, the group was combined with Air France to create Europe’s largest airline group.

Last month, Boeing and Aeroflot signed a contract to modify passenger cabins on 18 of the Russian flagship carrier’s 777-300ERs.