United will take its core reservation platform offline as part of a planned controlled restart of its SHARES booking system.

A technology outage grounded all United Airlines flights Wednesday evening. United Airlines is classifying the disruption as "controllable," meaning affected passengers are entitled to compensation.

Gift Article 10 Remaining As a subscriber, you have 10 articles to gift each month. Gifting allows recipients to access the article for free. The technology glitch that left United Airlines flights ...