The pilots talked to air traffic controllers who appear to have directed the planes to "resequence," and flight data appears to show both making a circle before landing safely.
The two flights, United Airlines Flight 1724 and Delta Air Lines Flight 1070 came too close to each other while arriving at the airport.
The Federal Aviation Administration is once again looking into a close call at a major U.S. airport, after two passenger jets narrowly avoided a mid-air collision as they attempted to land in Phoenix.
The FAA has launched an investigation into a loss of separation between two commercial flights in Phoenix Saturday.
The close call between the United and Delta flights at the Phoenix airport comes amid an increase in plane near-collisions.
Amazon has paused drone deliveries after a crash at its test site in Oregon. However, the company says this isn't the main reason for the pause.
The planes, carrying more than 350 people, experienced "a loss of required separation" while preparing to land at the same Phoenix airport, the FAA said.
The FAA is investigating a near-miss incident involving a United Airlines and a Delta Air Lines flight at Phoenix Sky Harbor International Airport,
Amazon halts drone deliveries in Texas and Arizona, citing possible safety concerns with its MK30 drone software.
An Amazon spokesperson said an incident that involved a crash at a testing facility in Oregon was not the primary reason for the pause.
Arizona's Executive Budget boosts highway maintenance funding and aids rural areas in securing federal grants.
Amazon confirmed that it voluntarily paused its Prime Air drone deliveries in Texas and Arizona, but downplayed the role of a reported crash of two drones in December at an Oregon testing facility as a factor in the decision.