Aer Lingus is to continue studying the new Airbus A330neo before finalising delivery plans for the nine A350s that it has long been committed to taking from the European airframer.

The Irish airline initially ordered half a dozen A350-900s, as well as six A330-300s, in 2007. It later deferred and ultimately switched three of the A330s to A350s, leaving it with nine A350s initially due for delivery between 2015 and 2018.

In February, it said this schedule could not be achieved and that it had revised delivery dates for the on-order A350s in addition to converting some to the regional version of the -900 model. These were likely to be delivered between 2018 and 2020, but further details awaited final agreements with Airbus.

This process was "substantially concluded" by the end of July, but the carrier said it would study the A330neo which Airbus launched during that month's Farnborough air show – for its potential suitability given future long-haul fleet requirements. "This process is continuing," said Aer Lingus in a statement on its third-quarter results today.

"We have been invited to have one more look at the A330neo," adds Aer Lingus chief executive Christoph Mueller. "We have been committed to the A350 for a long time, and we have almost completed the package on the A350, but we are taking a couple of weeks more to see what Airbus has to offer with the Neo. It might be a solution for us, but it's too early to come to conclusions.

"With our third Dublin-New York service, I believe we are about to mature in frequencies to certain destinations to the United States. So the remaining opportunity to grow would be the shell-size of the aircraft, and so far the A350 is a very tempting and very good proposition – that's the reason we bought it in the first place. That is basically what our fleet team is currently calculating in a couple of business plan alternatives."

For long-haul flights, Aer Lingus currently operates four A330-300s in 322-seat configuration, three A330-200s outfitted with up to 262 seats, and three 177-seat Boeing 757s. It will add a further A330-300 next summer.

The A350-900 has a baseline capacity of 315 seats in a two-class configuration. The A330-800neo will seat 252 and the A330-900neo up to 310.

Source: Cirium Dashboard