The budget airline saw net profits in April, May and June plummet 98% year-on-year to just €1.2 million.
Wizz Air has been hardest hit by issues with Pratt & Witney GTF engines that power many of its fleet and mean each aircraft must be taken out of service for around 300 days.
The grounding pushed up costs by more than 8%, with leased aircraft brought in for the summer peak costing €39 million. Wizz Air said foreign exchange “headwind” had also impacted its performance.
