By Guy Taylor Ryanair’s half-year profit has fallen 18 per cent amid a dip in the average price of its ticket fares and ongoing Boeing delivery delays. The budget airline reported a post-tax profit of €1.79bn (£1.5bn), even as passenger demand reached a record 115m, up nine per cent year-on-year. Revenue increased one per cent to €8.58bn. However, average fares fell 10 per cent over the period to €52, down from €58 the year prior. Such a dip had been forecast by chief executive Michael O’Leary in July, in a gloomy update which sparked a sell-off in a number of European airlines’ stocks. Shares…