Historical Note: The first Airbus short-haul aircraft arrived in 1998 in the form of the A321, initially to mainly operate the Dublin-Heathrow route. Six were delivered in 1998 and 1999 and continue in service today. The first A320 was delivered in 2000, with three more added to the fleet by 2001.

On 1 February 2001, Aer Lingus Commuter was merged back into the mainline operation. Business was severely affected by the 11 September attacks. Staff numbers were cut, destinations were dropped and the fleet was reduced. The airline has since weathered the storm and is back in profit. This has largely been achieved through a strategy of lowering the airline's cost base, updating the fleet with modern Airbus equipment and developing new routes to mainland European destinations. Aer Lingus had previously largely neglected mainland Europe in favour of US and British destinations. They are positioning themselves as competition to the European no-frills airlines while offering intercontinental flights as well. Business class travel for short-haul flights has been phased out. Cargo services remain on a small number of routes.

A large order for A320 aircraft saw deliveries commencing in 2004 and continuing to the present. The delivery of these aircraft allowed the withdrawal of the Boeing 737 to begin and on 29 October 2005, Aer Lingus withdrew its last two 737 aircraft from service, one of which was used on the Dublin to Nice route. This marked the end of the use of Boeing aircraft at Aer Lingus and made the fleet all Airbus.

Info: United Airlines Airbus A320-232 N439UA