An extra travel time needs to be budgeted to fly to India from overseas, with Indian airports emerging as the world's most-delayed airports with most frequent late arrivals into the country in 2008, according to US magazine Forbes.

Country's financial hub Mumbai's Chhatrapati Shivaji International and national capital's Indira Gandhi International (IGI) airports have grabbed the first and second ranks in terms of late arrivals in the world's most-delayed airports list compiled by Forbes.