A BBC analysis report has found that one in five flights from the UK to holiday destinations is delayed by more than 30 minutes.
Between June and September last year, around 380,000 of 199,000 flights were delayed, with most of these departing from Gatwick, Heathrow, Luton and Stansted.
Gatwick had the highest number of delays by over 30 minutes between the June-September period. After Gatwick, Belfast International had the second highest chance of delays, followed by Luton, Jersey and Edinburgh, according to the Civil Aviation Authority.
BBC England’s data found that the longest delay was a chartered flight from Manchester to Dusseldorf, of nearly 13 hours last September.
It also found that, of the summer months, delays are most likely to occur in June. Last summer, international flights were delayed by an average 21 minutes.
A spokesperson from Gatwick told the BBC that “repeated strike action on the continent over recent years and heavily congested airspace above parts of Europe and London, have led to a significant increase in the number of delays caused by wider air traffic control issues outside Gatwick’s control.”
A spokesperson for Belfast International Airport said:
“We do all we can to minimise delays.
“Our on-time performance is generally very good but sometimes we, too, fall victim to things that are outside our control.
“There is congested airspace in London and across Europe and it is clear there is a need to make improvements in aviation infrastructure.”