CONSUMER watchdog Which? has revealed an average of just 74% of flights in the UK arrived on time in a new report.
The study analysed 850,000 inbound flights across 35 airlines at 25 UK airports.
Worst performer was Canadian leisure airline Air Transat with 45% of its flights arriving more than 15 minutes late, followed by Icelandair (44%) and Norwegian (40%).
KLM was found to be the most punctual airline with just 12% of flights late.
A list of the most and least punctual airlines is released, prompting calls for more to be done to help consumers affected.
In the middle of the table were Ryanair (23%), British Airways (26%) and Easyjet (34%).
Richard Headland, editor of Which? magazine, said: “Flight delays are one of the most annoying things about travelling.
“These figures show just how frequently flights fail to reach their destination on time.
“If you’re unlucky enough to experience a severe delay, compensation is available and people should claim what they’re rightly entitled to.
“We know that resolving complaints with airlines can be a very tricky process, so we’re calling on the next government to legislate for a new, mandatory transport ombudsman.”
In certain circumstances, delayed passengers can claim compensation under EU law. But if the disruption is caused by factors such as extreme weather or airport strikes travellers are unlikely to receive a payout.