Research suggests that hesitancy to fly has fallen in the UK, with two-fifths of UK adults feeling less likely to travel on holiday due to Covid-19 than in October.Kantar and Service Science, research firms, asked respondents to rate their likelihood of flying on holiday in 2021. In May, 40% responded that they were less likely than last year. 27% agreed that they were significantly less likely.This compares to 52% who said in October that they would choose a destination for their 2021 holiday that they could travel by road over flying.It appears that people aged 45 or over are more willing to fly, which could be linked to increased vaccination rates. However, younger adults may also feel more comfortable flying.Only 30% of respondents between 45 and 64 said they are less likely to fly than 48% of 25-44-year olds. Last October, 50% of 45-64 year-olds stated they would prefer to not fly. 51% of 25-44-yearolds agreed.Nearly one-third of parents who have children at home (48%) stated that they were less likely than 58% to fly last October.In May, two out of five 16-24 year-olds (41%) reported that they were less likely than others to fly. This rate is similar to the rate for those 65 years and older (43%). In October, 54% of 65-plus and 45% of young adults were reluctant to fly.Service Science and Kantar conducted a survey of 1,278 adults in the UK for Travel Weekly between May 4 and 6.