Qantas plans to cut at least 1,000 jobs over the next year after reporting an expected pre-tax loss of up to $300 million in the first half of this financial year.Chief executive Alan Joyce says sales have deteriorated over the past few months as the airline engages in a war of words over foreign ownership with rival Virgin Australia."Our November figures have shown us that there continues to beÂ deterioration in the revenueÂ performance of the business and our competitor has justÂ received $350 million, meaningÂ they can continue their uncommercial behaviour," he told a media teleconference after the announcement."We are putting allÂ options on the table in aÂ review of our structure."Mr Joyce says the cuts will include 300 jobs already being axed at its heavy maintenance facility near Geelong in Victoria. Qantas has flagged a pre-tax loss of between $245 million and $300 million in the six months to December 31.Investors dumped Qantas shares following the announcement, with the company's share price dropping down more than 17 per cent at one point.It ended trade down 11.2 per cent lower at $1.07.It also expects to cut the salaries of Mr Joyce and the company's board.It will impose a pay freeze and ban bonuses for all other executives.Mr Joyce says the airline will do "what ever we need to do to secure the Qantas Group's future"."The challenges we now face are immense â but we will overcome them and we will continue to build a stronger and better Qantas for Australia," he said."Since the Global Financial Crisis, Qantas has confronted a fiercely difficult operating environment â including the strong Australian dollar and record jet fuel costs, which have exacerbated Qantasâ high cost base."Joyce sees 'uneven playing field' in sectorMr Joyce says Qantas is facing strong competition on domestic and international routes."Our competitors in the international market, almost all owned or generously supported by their governments, have increased capacity to pursue Australian dollar profits, changing the shape of the market permanently," he said.Mr Joyce said Virgin Australia has created an "unprecedented distortion" through its recently announced $350 million capital raising, which has been backed by major shareholders Air New Zealand, Singapore Airline and Etihad.