Wizz Air, the Hungarian low-cost airline, said fares were rising after higher fuel costs and disruption in the Middle East cut its first-half profit by two-thirds.
Net profit fell 67% to €108.1 million in the six months to 30 September, down from €323.5 million a year earlier.
Operating profit dropped 40% to €264.5 million.
Revenue per available seat kilometre, a key airline measure of income per unit of capacity, rose around 5% in October.
Ticket revenue per passenger was up 7% that month.
Chief executive József Váradi said: "Fuel remains the main headwind, and our hedging, covering 82 per cent of second-half requirements, is doing what it was designed to do."
Second-quarter recovery
The first half was hit by disruption in the Middle East at the start of the period, which pushed down fares and drove up fuel prices.
Profit recovered in the second quarter, with operating profit up 9% to €447.8 million and net profit up 7% to €306.3 million.
Fuel costs rose 34% to €1.24 billion in the first half.
Revenue increased 14% to €3.8 billion as passenger numbers climbed 26% to 46.1 million.
The average fare per passenger, including extras such as bags and seat selection, fell 10% to €82.50.
Unit costs excluding fuel were flat, helped by fewer cancellations and lower compensation payments.
Engine problems ease
Wizz Air had 22 aircraft grounded for inspections of its Pratt & Whitney GTF engines at the end of September, down from 35 a year earlier.
It expects no planes to be grounded for engine problems by the end of 2027.
The airline forecasts unit revenue growth in the low single digits for the third quarter, while non-fuel unit costs for the full year should rise by a mid-single-digit percentage.
Net debt rose to €5.16 billion from €4.94 billion in March.
Wizz Air is opening new bases in Spain, Kosovo and Romania this winter.
