Punctuality at low-fares airline Ryanair worsened in July 2017 compared with the same month in 2016.
Meanwhile, the volume of consumer complaints increased in the same period.
While 83 per cent of Ryanair flights were on time in 2017, this was down from 85 per cent in July 2016.
Complaints related to bags increased from 0.60 per 1,000 custmers in 2016 to 0.66 per 1,000 customers in 2017 while general complaints increased from 1.61 to 2.06 per 1,000 customers.
Some 11,730 Ryanair flights were not considered to be on-time in July “due to unseasonably bad weather and ATC [air traffic control] delays,” the company said in a statement.
Last week Ryanair chief executive Michael O'Leary told the London Independent that a European regulation that came into force in April regarding passport checks was impacting his company's passengers, who were then missing their flights and ultimately impacting the company's punctuality.