Low-cost African airline fastjet's operating losses from continuing activities rose to $31.0m in the six months to the end of June - up from $12.8m last time.
Revenues rose to $33.1m from $31.5m but the group reports an after-tax loss of $15.0m against a profit of $6.4m a year ago.
Chief executive Nico Bezuidenhout said:"The first six months of 2016 was a very difficult and challenging time for fastjet. While positive developments included the launch of fastjet flights between Harare and Johannesburg, adverse economic and trading conditions significantly impacted the Company's financial results and passenger numbers.
"As a result, my focus since being appointed has been to undertake a fundamental review of all aspects of fastjet's business model and operations. My immediate priority is to stabilise the business, reduce costs and ensure that we have the correct size of fleet, in terms of both number and size of aircraft.
"I am pleased to report that this work is beginning to deliver some tangible results. We are relocating fastjet's Head Office from Gatwick to Johannesburg (our largest international destination) so as to both reduce costs and be much closer to our home markets.
"By the end of the year, our existing fleet of five A319 aircraft will be reduced to three and will be replaced by three smaller leased aircraft, an initiative which is expected to lead to a reduction in seat capacity and trip-cost of approximately 15%.
"We continue to pursue cost-reduction and revenue-generating initiatives and to refine and develop our customer offering and low cost model. Conditions remain very challenging and there is much work to be done.
"But I am confident that the business is becoming more stable and that we are slowly moving towards a platform from which, in due course, fastjet will be able to consider gradual expansion opportunities and start to deliver on its undoubted potential."