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

Frontier Airlines rejects the notion that UFC Hall of Famer Khabib Nurmagomedov was removed from a flight for any reason other than not being compliant with Federal Aviation Administration requirements. Nurmagomedov confirmed Sunday that he was escorted off a Frontier

The FAA is investigating after two passenger jets carrying hundreds of passengers almost collided near Phoenix Sky Harbor International Airport on Saturday. Both planes were cleared to land at 11 a.m. local time when Delta Flight 1070 received a collision ...