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.

A “technology issue” that prompted United Airlines to ground flights across the US on Wednesday, triggering more than 1,000 delays and dozens of cancellations, has been resolved, the airline told CNN.

United Airlines has grounded flights nationwide on Wednesday night due to an issue with its weight and balance computer system.

Hundreds of United Airlines flights were disrupted on Wednesday evening as the carrier grappled with a major computer system outage. The airline requested ground stops at its major hubs in the U.S.

An undisclosed “technology issue” delayed more than 1,000 United Airlines flights across the U.S. United Airlines said in a statement Wednesday that flights on major routes were held at their departure airports because of a technology issue.

A technical issue forced United Airlines to hold all mainline flights at departure airports on Wednesday evening, sparking travel chaos across the U.S.

Travelers at airports in Newark, Chicago, San Francisco and Houston faced delays due to a "technology issue" Wednesday night, the airline said.

United Airlines recently filed a lawsuit against a popular online travel agency, accusing it of false advertising and illegally marketing and selling United flights.

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.