His walks, sometimes up to 43 miles per day, have helped raise many hundreds of thousands in funds for charity since the 1980s.
Ó Dúlaing presented the hour-long programme Fáilte Isteach at 10 pm on Saturday evenings on RTÉ Radio 1 and had thousands of listeners among the Irish diaspora who would enter his 'Parlour of Dreams' where 'many dreams came true' on the programme.
[3] The president of Ireland, Michael D. Higgins, presented a specially commissioned sculpture to him at Áras an Uachtaráin in Phoenix Park, Dublin in August 2014 in recognition of his contribution to Irish culture.
[4] A 288-page illustrated memoir titled Donncha's World- the Roads, the Stories and the Wireless, co-authored with writer Declan Lyons and launched by his friend, the singer Daniel O'Donnell, in September 2014, tells the story of his life and career, his walks, his broadcasts and the national and internationally famous people he has interviewed and met including President Eamon de Valera, Pope John Paul II, Edna O'Brien, Rosie Hackett, Mick Jagger, Sir Edmund Hillary and Gene Kelly.
Ó Dúlaing and his wife Vera (née Galvin) lived in Dublin near RTÉ Headquarters in Donnybrook.