The Federal Aviation Administration is investigating a narrowly missed midair collision between a United flight and a Delta flight at Phoenix Sky Harbor International Airport on Saturday, the agency said.

The United and Delta flights were less than a quarter of a mile apart horizontally before the warning devices went off, officials say.

Here's when you can eat and drink at Garrett Popcorn, Guy Fieri's Phoenix Kitchen + Bar and other new options opening in Terminal 4 soon.

The Federal Aviation Administration is investigating after a United Airlines flight and a Delta Airlines flight had a near-collision over Phoenix on Saturday.

Multiple airlines are being affected by the delays including DELTA, American Airlines, Southwest, and a few others.

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.

FAA officials say the two planes "landed safely after experiencing a loss of required separation" as they were headed to Sky Harbor.