Delta and an airline that doesn't fly yet say they'll run flights between the US and Saudi Arabia

Delta Air Lines said Tuesday it has entered into a partnership with startup Riyadh Air with the goal of operating flights between the United States and Saudi Arabia.

Riyadh Air, which plans to begin passenger flights next summer, is backed by Saudi Arabia’s sovereign-wealth fund and is part of the country’s plan to diversify its oil-based economy and boost tourism.

Atlanta-based Delta and Riyadh did not give a timetable for beginning flights or financial details around their partnership. Their CEOs said neither airline is taking an ownership stake in the other.

Delta CEO Ed Bastian and Riyadh Air CEO Tony Douglas said they envision selling tickets on each other’s flights — a practice known as codesharing — that requires approval from the U.S. Transportation Department.