Saudi Arabia is the fourth busiest air route in the world.
According to Subak website, OAG, the organization that publishes air travel data, has said that Jeddah, Riyadh and Dammam are the busiest stations in Saudi Arabia.

"Similarly, the Dubai-Riyadh route has carried 3.2 million passengers so far, making it busier than the New York-London route, which is ranked third and has carried 2.8 million passengers."
"Dubai and London are at the fourth position, Kuala Lumpur and Singapore are at the fifth position, Dubai and Jeddah are at the sixth position, Orlando and San Juan are at the seventh position, Dubai and Mumbai are at the eighth position, Cairo and Riyadh are at the ninth position and Dubai and Delhi are at the tenth position. '.