The Houthi attacks caused the cancellation of "about 90 percent" of the flights to Riyadh.
Data from flight tracking websites shows that the Houthi attacks in Yemen have almost emptied the skies of Riyadh, so that 9 out of 10 flights are cancelled.
The latest data from the Sirius website, which analyzes flight data, shows that between October 8 and 25 (about two weeks ago), 4071 flights were canceled out of a total of 4736 regular flights.
In recent months, the Houthis, allied with Iran, have increased their missile and drone attacks on oil installations, ports and airports in Saudi Arabia.
Riyadh International Airport, which is Saudi Arabia's busiest airport after Jeddah, has been the target of Houthi ground attacks many times, including the October 10 ground attack that killed 13 people.
Yesterday, the Saudi authorities announced that they would reopen the King Khalid Airport in Riyadh after two weeks of closure, but there were reports of continued attacks by the Houthis and widespread cancellation of flights. The Houthis warned that the airport in Riyadh remains a "military target" and "unsafe".