A British Airways Boeing 777 on a transatlantic route to Chicago declared an emergency on October 5, 2026, after losing around 27,000 feet of altitude rapidly. The aircraft turned back and returned to London safely. Cabin depressurization was identified as the reason for the emergency.

A passenger on board described a rapid loss of altitude and cabin pressure during the incident. The alarming event unfolded over the Atlantic before the crew made the decision to divert. The flight's diversion was covered by several news organizations including Sky News, CBS News, and The Guardian.