A United Airlines flight was allegedly delayed for four hours after a passenger smoked cannabis in the plane 's toilets. Flight UA1679 was due to take off from San Francisco airport to Cancun in Mexico on 5 August, but was delayed at first due to administrative issues.

United Airlines' venture capital arm said on Wednesday it has invested in aerospace startup Astro Mechanica, which develops airframe designs and propulsion systems for supersonic aircraft, signaling renewed industry interest in ultra-fast jets.

A Denver man is lamenting the loss of thousands of dollars after rebooking a United Airlines flight following the cancellation of an earlier one, according to a 9News report.

“Boston, American 2616 we’re lowering to 8,000, declaring a mayday,” the pilot says in an audio recording posted by LiveATC.net. “We need to return back to Boston. We have a loss of the autopilot, loss of auto-thrust and we have a position disagree between both of our [flight management systems]”