India’s leading private airline Jet Airways announced plans to take delivery of four new A330-300 aircraft from Airbus by year-end, an airline official says.

The first of the four “new, state-of-the-art series” aircraft was delivered on Dec. 12, the official adds. “The remaining aircraft are likely to be delivered later this month.”

The first two A330-300s will replace two leased Airbus A330-200s. The other two will be deployed progressively on international routes, the official says.

“With unmatched performance, unrivaled economics and reliability, the A330 is the ideal aircraft for medium- to long-haul routes,” says Kiran Rao, Airbus EVP-strategy, sales and marketing.

The first A330-300 is expected to start operations Dec. 22 on the Mumbai-Brussels route.

In July, Jet Airways signed a 10-year maintenance deal worth $150 million with engine maker GE Aviation for new CF6-80E engines installed on the A330s.

The airline currently has 11 A330-200 aircraft in its fleet of 100 aircraft, 40 of which it owns. The rest are leased. It is scheduled to take delivery of 29 aircraft from Boeing through 2016.

Jet Airways, which is the country’s largest airline by market share, in recent months has been working toward expanding its fleet.

Last week, the company announced plans to take delivery of five ATR 72-600 aircraft by March as gradual replacements for its 18 ATR 72-500s.

The ATR 72-600 aircraft will serve the airline’s domestic network and provide enhanced connectivity to Tier 2 and 3 cities and towns across India.