Wizz Air Holdings PLC (AIM:WIZZ) shared dropped more than 1.5% after it was found to be the biggest offender for delaying its flights in the UK, again.
On average, flights from the budget airline leaving the UK depart 31 minutes and 36 seconds after they are scheduled to, research from the Civil Aviation Authority found.
While it is a slight improvement on last year, it wasn't enough to stop Wizz Air from being crowned the tardiest airline for the third consecutive year.
Despite the poor punctuality, the FTSE 250 firm saw a slight rise in passengers during May, carrying some 5.13 million passengers, representing a 1.2% rise in capacity year-on-year.
Turkish Airlines was ranked second-worst with an average delay time of 28 minutes and 36 seconds, followed by Tui at 28 minutes and 24 seconds.
Emerald Airlines was found to be the most punctual airline with passengers waiting an extra 13 minutes and six seconds on average, slightly ahead of Virgin Atlantic's 13 minutes and 42 seconds.
"Helping our customers reach their destination is our number one priority and we will continue to invest in our service to ensure they get there on time," a Wizz Air spokeswoman said.