UA1631 - Incident: United B739 near Chicago on Apr 30th 2026

A United Boeing 737-900, registration N61882 performing flight UA-1631 from Newark,NJ to Las Vegas,NV (USA), was enroute at FL320 about 150nm north of Chicago,IL (USA) when the crew decided to divert to Chicago O'Hare,IL reporting an unusual odour in the back of the cabin. The aircraft landed safely on O'Hare's runway 28R about 30 minutes later.

The airline reported the aircraft diverted to Chicago due to an odour in the back of the cabin.

A replacement Boeing 737-900 registration N69838 reached Las Vegas with a delay of about 4.5 hours.

The occurrence aircraft returned to service about 24.5 hours after landing.