AER Arann will cease to operate flights under its own name from next week when all its services will be branded as Aer Lingus Regional.
The two airlines entered into a partnership in January 2010 under which Aer Arann began to operate some services under the Aer Lingus Regional brand. The partnership has since been extended.
Without having the agreement in place, Aer Arann would probably not have been able to exit examinership in November 2010. The deal to resolve the airline's financial difficulties also meant UK transport group Stobart took a substantial share in the business.
It also resulted in Galway native Padraig O Ceidigh retaining a minority share in the airline he had headed since 1994. Stobart agreed to invest €2.5m to market Aer Arann services to an airport it owns in Essex.
Aer Arann will operate the Aer Lingus Regional service between Dublin and Essex from May and flies to 27 destinations, including seasonal services.
In February, Aer Lingus Regional had 59,000 booked passengers, up 23pc from 48,000 in February 2011.
Aer Lingus chief executive Christoph Mueller said recently that he was "super optimistic" about the airline's partnership with Aer Arann.