Singapore Airlines (SIA) has placed an order for 30 Boeing 787-10X aircraft, and it has ordered 30 more Airbus A350-900s.

The Star Alliance carrier says it will order 30 787-10X aircraft under the condition that Boeing formally launches the 787-10X program.

It says its agreement with Boeing stipulates it will receive the first 787-10X aircraft in the 2018-19 fiscal year. SIA’s fiscal year always starts on April 1.

The deal with Airbus is a firm order for 30 A350-900s with the first to be delivered in the 2016-17 fiscal year, with options for 20 more that can be converted to the larger Airbus A350-1000. Rolls-Royce is the sole engine supplier on the A350-900. An engine selection for the 787-10X aircraft has yet to be made.

“The agreement with Airbus is SIA’s third for A350-900s, lifting the airline’s firm orders for the type to 70. They are intended for use on medium and long-range routes. The 787-10Xs are also intended for use on medium-range routes,” according to a statement issued on Thursday.

The order for large capacity medium-haul aircraft is a sign that SIA sees growth potential on routes within Asia Pacific and to the Middle East.

SIA CEO, Goh Choon Phong, says: “Today’s aircraft orders are among the biggest in SIA’s history, helping to ensure that we retain our industry leading position. They demonstrate our commitment to the Singapore hub and our confidence in the future for premium full-service travel.”