United Airlines flight 4166 — from Pennsylvania to Chicago — made an emergency descent after rapidly losing cabin pressure 40,000 feet above Ohio.

The plane left the Lehigh Valley International Airport in Allentown, Pennsylvania, around 5:24 a.m. and was expected to arrive at Chicago's O'Hare International Airport at 8:44 a.m.

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.

United predicted first-quarter profit well ahead of Wall Street’s estimates as the carrier capitalizes on unusually strong demand for premium and international travel.

The close call between the United and Delta flights at the Phoenix airport comes amid an increase in plane near-collisions.

The United Airlines flight was forced into a sharp fall after experiencing a sudden fault at 40,000ft prompting an urgent call to air traffic control

American Airlines Group Inc. tumbled after forecasting a surprise first-quarter loss in a setback as the carrier works to win back corporate travel after a strategic blunder last year.

United Airlines said it was cooperating with U.S. and Nigerian investigators to determine what exactly happened on the flight.

In an update, Nigerian officials said an additional 27 passengers and 5 crew members suffered minor injuries in the incident. In all, 38 were hurt.

Originally built as a biplane, the Stinson Detroiter launched one of the largest aviation companies in America

In the latest air travel developments, the United Kingdom has made a significant change in its new requirement, effective this month, that all foreign arrivals must obtain an electronic travel authorization online before arrival;

Six people were injured on a flight from Nigeria to Virginia. The airline also saw a series technical issues in March.