Indonesia's national flag carrier Garuda Indonesia says it will take delivery of 24 new aircraft at a cost of $1.57 billion next year as an effort to expand business, media reported here on Monday.

The aircraft comprise four Boeing B777-300 Extended Range (ER) aircraft, 10 B737-800 Next Generation (NG) aircraft, two Airbus A330-320s, one A330-300s and seven Bombardier CRJ1000 NextGen aircraft, president director of the firm Emirsyah Satar said.

"They will be used to help expand both our domestic and international networks. As for the B777s, they will replace our aging B747 series," Emirsyah was quoted by the Jakarta Post as saying.

The B747s that Emirsyah referred to are currently used for the airline's long-haul routes, such as JakartaAmsterdam and Jakarta Jeddah.

The president director said that Garuda planned to expand its international service to include service from Jakarta to London in the UK; Brisbane, Australia; and Auckland, New Zealand; next year, "we expect to open the new international routes by the end of 2013."

Marketing director Elisa Lumbantoruan said that the airline would fly each of the routes four times a week by the third quarter of 2013.

"In the future, as we will have more aircraft, we will increase the service from four times to seven times a week," he said.

Garuda currently operates 96 aircraft with an average age of 6. 23 years. The airline flies to more than 50 destinations domestically and internationally.

Under the airline's Quantum Leap program, it plans to increase its fleet numbers to 194 aircraft with an average age of 5 years by the end of 2015.

Emirsyah also said that Garuda's low-cost carrier, Citilink Indonesia, would receive 10 new A320s next year that are worth about $900 million.