Flight and reported altitude
Delta Flight 2311 was traveling from Los Angeles to Salt Lake City on September 6 when the Boeing 737-900 encountered an issue at approximately 36,200 feet, according to a report cited in the available information. Another account identified the aircraft as a Boeing 737-900ER registered N934DZ.
The available reports describe a rapid depressurization. One description states that the aircraft rapidly descended toward Las Vegas after the event. The aircraft was reported to have descended from approximately 35,000 feet to 9,000 feet before diverting to Las Vegas.
Air traffic control instructions
Recorded communications identify the aircraft as “Delta 2311” during the rapid descent. Las Vegas approach instructed Delta 2311 to “descend and maintain 9,000.”
The instruction was repeated: “Descend and maintain 9,000, Delta 2311.” The available communications do not provide additional details about the aircraft’s condition beyond the rapid descent and the instructions issued during the approach.
Diversion to Las Vegas
The available information states that Delta Flight 2311 diverted to Las Vegas. A further transmission directed Delta 2311 toward Las Vegas Harry Reid Airport via radar vectors and listed runway 26 Left as the expected runway.
The reports do not establish additional details about the landing, injuries, aircraft damage, or the underlying cause beyond the reported depressurization.
Cabin reports
One account said that oxygen masks suddenly deployed inside the cabin. A passenger claimed that the aircraft had experienced a pressurization problem and described the experience as “pretty traumatic.” The passenger also wrote that their ears began hurting, that the oxygen masks dropped, and that the aircraft made a rapid descent into Las Vegas.
Another account said flight attendants attempted to make announcements while wearing their own oxygen masks, but passengers struggled to hear them. These statements are attributed to reports and passenger accounts; the available fact cards do not establish further details about the event.