Delta Flight DL2311 Makes Emergency Descent, Diverts to Las Vegas After Cabin Pressure Failure

Delta Air Lines Flight DL2311 lost cabin pressure at cruising altitude on Sunday, September 6, 2026, forcing the crew to make a rapid emergency descent — from around 35,000 feet down to about 9,000 feet in roughly ten minutes — and land in Las Vegas instead of continuing to its scheduled destination.

Key facts

Flight: Delta DL2311, Boeing 737-900ER (registration N934DZ)
Route: Los Angeles (LAX) to Salt Lake City (SLC)
Date: Sunday, September 6, 2026
What happened: Cabin pressure failure at about 35,000 feet over the Mojave Desert
Emergency descent: From about 35,000 feet to about 9,000 feet in roughly ten minutes
Diverted to: Harry Reid International Airport, Las Vegas
Aboard: Roughly 180 passengers and crew combined — most reports say 174 passengers and six crew; one outlet, Yahoo News Canada, gives 181
Injuries: None requiring hospitalization

What happened in the air

The flight, a Boeing 737-900ER (registration N934DZ) flying from Los Angeles International Airport to Salt Lake City International Airport, was over the Mojave Desert region when the pressurization failure occurred at cruising altitude, around 35,000 feet. Oxygen masks dropped throughout the cabin, and the crew began a rapid emergency descent, leveling off at about 9,000 feet before diverting to Harry Reid International Airport in Las Vegas. Harry Reid was the nearest airport suited to handle an emergency landing, given where the plane was when the failure happened.

How many people were aboard

Roughly 180 people — passengers and crew combined — were aboard. Most outlets report 174 passengers and six crew members; one syndicated outlet, Yahoo News Canada, instead gives a combined figure of 181.

Injuries and passenger accounts

No injuries requiring hospitalization were reported. That is not the same as saying nobody felt anything: several passengers described ear pain, headaches, disorientation and emotional distress during the rapid altitude change, and some described the descent as frightening, even though none of them needed hospital treatment.

Delta’s statement

Delta issued a statement addressing the crew’s handling of the emergency: “As safety comes before everything else at Delta, the flight crew of Delta flight 2311 LAX-SLC followed their training and procedures to safely bring the aircraft to optimal altitude when an unexpected pressurization issue occurred.”

After landing

After landing in Las Vegas, passengers deplaned normally and were rebooked by Delta onto other flights to complete their trip to Salt Lake City. One report said FAA (Federal Aviation Administration) safety inspectors and Delta’s own technical crews examined the aircraft after it landed and that it was pulled from service temporarily; that detail comes from a single source and has not been independently corroborated.

What’s confirmed and what isn’t

The flight number, aircraft, route and the fact of the pressurization failure and diversion are well established. What has not been publicly disclosed is the exact technical cause of the failure — Delta, the FAA and the NTSB (National Transportation Safety Board) have not released a finding on what triggered it. As of September 9, 2026, neither the FAA nor the NTSB has put out a statement confirming a formal investigation into this specific flight.

DL2311 is also a distinct event from several other Delta incidents reported around the same time:

A separate cabin-pressurization incident on a Salt Lake City-to-Portland flight
An earlier medical-emergency diversion to Detroit
Delta Flight DL755, a different flight that also diverted to Las Vegas

Each involved a different flight number, cause or date.