A nationwide technology issue affecting United Airlines' Unimatic system caused significant flight delays on Wednesday evening. The problem, which began around 5:12 p.m. CT, was resolved by 9 p.m. CT, but residual delays are expected. The outage, unrelated to recent cybersecurity concerns, impacted numerous airports, including Bush Intercontinental Airport in Houston. United is covering customer expenses such as hotels. Passengers reported lengthy tarmac delays.

Prepared by Jonathan Pierce and reviewed by editorial team.