A BBC analysis of Civil Aviation Authority data has found that 20% of flights to popular holiday destinations are delayed by more than 30 minutes.
The research looked at data from 25 UK airports for the period between June and September 2016 and found that 38,000 out of 199,000 international flights from UK airports to popular destinations were delayed. The statistics do not cover flights that were cancelled.
Most delays were from London airports, with Gatwick Airport experienced the most flight delays, 30% – or 107,825 – of all its flights delayed by over 30 minutes over the period in question.
Three-quarters of the 40 most delay-prone popular routes out of the UK last summer were to European countries, although non-European destinations with high numbers of delays were Ghana, Canada, US, Israel, Ukraine and Pakistan.
The most delay-afflicted route was from Heathrow to Accra, Ghana. Seventy percent of flights on this route were delayed by over 30 minutes last summer.
The BBC report comes just a week after Gatwick was ranked second worst airport in the world by flight delay compensation specialists AirHelp. Two other airports, Manchester and Edinburgh, were ranked in the bottom six.