[2] The airline was established in 2004 and started operations on 23 December 2004[2] with an inaugural flight to Agadir with an Airbus A320.

The company founders include former Skynet Airlines personnel and Bernard Healy, who owns Idray, a Dublin company controlling the operations of Omni Tours, Omni Travel, Malaga Express and Faro Express.

[3] Eirjet made an application to the United States Department of Transportation to permit the airline to perform ad hoc charters between Ireland and the USA, within the US and from the US to third countries.

For example, on February 18, 2006, the airline wet-leased all three Airbus aircraft to Ryanair and hired in three aircraft from airlines including Transavia, Flyjet and Eagle Aviation to cover its own charter program.

Overselling its actual capacity and wet leasing in additional aircraft can be attributed to Eirjet's cashflow difficulties, with most subchartered activity costing the company far in excess of the revenue generated from operating the flights.