Riyadh, Jan 04, 2019, SPA -- Riyadh-based King Khalid International Airport of Riyadh and Dammam-based King Fahd International Airport ranked among world class airports, in terms of abiding by flights take off and arrival, in 2018, according to Official Airlines Guide (OAG) website for airports' rating. While King Khalid Airport ranked the 11th among 20 large airports category, in the world, its sister King Fahd International Airport ranked the 2nd, among medium-size airports category, in 2018. -- SPA 21:42 LOCAL TIME 18:42 GMT 0011 www.spa.gov.sa/w815348