The study also claimed that around 3.2 million motorists have admitted to driving home after a flight despite being tired, while it was revealed that 53 per cent of people have to drive over 50 miles when doing so.
Andrew Goodsell, chief executive of Saga, said: "This research reveals a worrying picture. A lack of sleep or drinking onboard can mean that drivers are not fully alert for the journey home.
"We recommend that anyone driving after flying plans their journey to include time for adequate rest, or take a taxi or public transport to get home if they know they are likely to feel tired."
Recent research by Churchill found that people from East Anglia are the most likely in the UK to make insurance claims related to windscreen damage.
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