Flights across the US are delayed after a major IT outage hit at least 5 major airlines

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United Airlines is affected.

• Dozens of flights have been delayed after the FAA said several major airlines are experiencing an IT issue which is causing delays.
• The affected airlines include Southwest Airlines, Delta, United Airlines, Jet Blue, and Alaska Air.

Flights at US airports across the country are delayed because of an IT failure affecting at least five airlines, the FAA has said.

Southwest Airlines, Delta, United Airlines, Jet Blue, and Alaska Air are affected, and delays are expected, the authority told CBS.

Some of those airlines told passengers on Twitter that an IT failure was to blame.

This is a developing story, check back for updates.