Virgin Blue Holdings Ltd (ASX: VBA) said on Monday that total loss incurred on its computerised reservation system crash last month could run from $15 million to $20 million.

The check-in and operating system malfunction last September 26 led to service disruptions that lasted for 11 days that saw the cancellation of numerous flights and forced Virgin Blue ground crews to implement manual check-in service nationwide.

The company was also left to deal with disgruntled passengers whose flights were delayed and many ended up being billeted for overnight stay in hotels.

Virgin Blue group executive Andrew David said that the airline is seriously studying its legal options as he stressed that the company would actively pursue all available avenues for recovering the cost of the meltdown of its Navitaire/Accenture computer system.

The airline said that its general trading conditions were witnessing marked improvements from the previous corresponding period before the system breakdown but the issue could possibly reverse the earlier gains being achieved by company.

The whole episode saw the summoning of Navitaire and Accenture senior executives to Australia to personally supervise the restoration of the system as Virgin Blue expressed displeasure on its systems' provider for its failure to adequately respond on the crisis' initial stage.

Virgin Blue chief executive John Borghetti said that Navitaire would have to deal with a substantial compensation bill due to the system glitch as he added that further talks would be conducted with the companies to delve on issues learned during the system breakdown.

As of 1130 AEDT on Monday, Virgin Blue shares were trading down by half a cent to 46 cents.